./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-tiling/mbpr3.c --full-output --preprocessor.use.memory.slicer true --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/mbpr3.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 a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 18:15:26,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 18:15:27,042 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 18:15:27,047 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 18:15:27,047 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 18:15:27,071 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 18:15:27,072 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 18:15:27,072 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 18:15:27,073 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 18:15:27,075 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 18:15:27,076 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 18:15:27,076 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 18:15:27,077 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 18:15:27,078 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 18:15:27,078 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 18:15:27,078 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 18:15:27,078 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 18:15:27,079 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 18:15:27,079 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 18:15:27,079 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 18:15:27,080 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 18:15:27,080 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 18:15:27,081 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 18:15:27,081 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 18:15:27,092 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 18:15:27,092 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 18:15:27,092 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 18:15:27,093 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 18:15:27,093 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 18:15:27,094 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 18:15:27,094 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 18:15:27,095 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:15:27,095 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 18:15:27,095 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 18:15:27,095 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 18:15:27,095 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 18:15:27,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 18:15:27,096 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 18:15:27,096 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 18:15:27,096 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 18:15:27,096 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 18:15:27,097 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 18:15:27,097 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 18:15:27,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 18:15:27,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 18:15:27,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 18:15:27,336 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 18:15:27,336 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 18:15:27,337 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr3.c [2023-11-22 18:15:28,389 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 18:15:28,577 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 18:15:28,579 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr3.c [2023-11-22 18:15:28,585 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a2269805/684e43b645ad47af9068ec85c4fd6e1d/FLAG82b57f0f2 [2023-11-22 18:15:28,606 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a2269805/684e43b645ad47af9068ec85c4fd6e1d [2023-11-22 18:15:28,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 18:15:28,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 18:15:28,611 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 18:15:28,611 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 18:15:28,615 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 18:15:28,616 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1639bba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28, skipping insertion in model container [2023-11-22 18:15:28,617 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,636 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 18:15:28,764 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/mbpr3.c[396,409] [2023-11-22 18:15:28,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:15:28,810 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 18:15:28,824 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/mbpr3.c[396,409] [2023-11-22 18:15:28,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:15:28,862 INFO L206 MainTranslator]: Completed translation [2023-11-22 18:15:28,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28 WrapperNode [2023-11-22 18:15:28,863 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 18:15:28,864 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 18:15:28,864 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 18:15:28,864 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 18:15:28,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,886 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,917 INFO L138 Inliner]: procedures = 15, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 116 [2023-11-22 18:15:28,918 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 18:15:28,919 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 18:15:28,919 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 18:15:28,919 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 18:15:28,927 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,931 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,949 INFO L189 HeapSplitter]: Split 30 memory accesses to 3 slices as follows [2, 8, 20] [2023-11-22 18:15:28,949 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,949 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,964 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,967 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,971 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,972 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,974 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 18:15:28,975 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 18:15:28,976 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 18:15:28,976 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 18:15:28,977 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28" (1/1) ... [2023-11-22 18:15:28,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:15:28,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:29,002 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 18:15:29,027 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 18:15:29,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 18:15:29,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 18:15:29,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 18:15:29,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 18:15:29,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 18:15:29,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 18:15:29,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 18:15:29,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 18:15:29,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 18:15:29,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 18:15:29,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 18:15:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 18:15:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 18:15:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 18:15:29,126 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 18:15:29,128 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 18:15:29,274 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 18:15:29,293 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 18:15:29,294 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-22 18:15:29,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:15:29 BoogieIcfgContainer [2023-11-22 18:15:29,294 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 18:15:29,296 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 18:15:29,296 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 18:15:29,298 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 18:15:29,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:15:28" (1/3) ... [2023-11-22 18:15:29,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3bb0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:15:29, skipping insertion in model container [2023-11-22 18:15:29,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:28" (2/3) ... [2023-11-22 18:15:29,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3bb0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:15:29, skipping insertion in model container [2023-11-22 18:15:29,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:15:29" (3/3) ... [2023-11-22 18:15:29,301 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2023-11-22 18:15:29,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 18:15:29,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 18:15:29,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 18:15:29,351 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;@596792d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 18:15:29,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 18:15:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-22 18:15:29,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:29,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:29,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:29,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:29,363 INFO L85 PathProgramCache]: Analyzing trace with hash 139679752, now seen corresponding path program 1 times [2023-11-22 18:15:29,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:29,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709695111] [2023-11-22 18:15:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:29,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:29,516 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 18:15:29,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:29,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709695111] [2023-11-22 18:15:29,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709695111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:15:29,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:15:29,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 18:15:29,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754511835] [2023-11-22 18:15:29,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:15:29,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 18:15:29,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:29,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 18:15:29,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 18:15:29,556 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:29,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:29,597 INFO L93 Difference]: Finished difference Result 52 states and 79 transitions. [2023-11-22 18:15:29,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 18:15:29,600 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-22 18:15:29,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:29,605 INFO L225 Difference]: With dead ends: 52 [2023-11-22 18:15:29,605 INFO L226 Difference]: Without dead ends: 24 [2023-11-22 18:15:29,607 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 18:15:29,610 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:29,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:15:29,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-22 18:15:29,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-22 18:15:29,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-22 18:15:29,636 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 16 [2023-11-22 18:15:29,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:29,636 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-22 18:15:29,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-22 18:15:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-22 18:15:29,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:29,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:29,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 18:15:29,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:29,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:29,639 INFO L85 PathProgramCache]: Analyzing trace with hash -834490832, now seen corresponding path program 1 times [2023-11-22 18:15:29,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:29,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855506128] [2023-11-22 18:15:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:29,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:29,827 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 18:15:29,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:29,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855506128] [2023-11-22 18:15:29,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855506128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:15:29,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:15:29,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 18:15:29,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022545773] [2023-11-22 18:15:29,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:15:29,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 18:15:29,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 18:15:29,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 18:15:29,835 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:29,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:29,879 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2023-11-22 18:15:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 18:15:29,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-22 18:15:29,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:29,880 INFO L225 Difference]: With dead ends: 29 [2023-11-22 18:15:29,880 INFO L226 Difference]: Without dead ends: 27 [2023-11-22 18:15:29,881 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 18:15:29,882 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:29,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:15:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-22 18:15:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-22 18:15:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 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 18:15:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-22 18:15:29,886 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2023-11-22 18:15:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:29,886 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-22 18:15:29,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-22 18:15:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-22 18:15:29,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:29,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:29,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 18:15:29,888 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:29,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:29,889 INFO L85 PathProgramCache]: Analyzing trace with hash -834431250, now seen corresponding path program 1 times [2023-11-22 18:15:29,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:29,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753838053] [2023-11-22 18:15:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:29,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:30,144 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 18:15:30,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:30,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753838053] [2023-11-22 18:15:30,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753838053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:15:30,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:15:30,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 18:15:30,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23298489] [2023-11-22 18:15:30,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:15:30,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 18:15:30,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:30,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 18:15:30,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-22 18:15:30,150 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:30,216 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-11-22 18:15:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 18:15:30,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-22 18:15:30,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:30,219 INFO L225 Difference]: With dead ends: 53 [2023-11-22 18:15:30,219 INFO L226 Difference]: Without dead ends: 35 [2023-11-22 18:15:30,222 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 18:15:30,225 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:30,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 18 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:15:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-22 18:15:30,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2023-11-22 18:15:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 18:15:30,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-11-22 18:15:30,242 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2023-11-22 18:15:30,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:30,242 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-11-22 18:15:30,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:30,242 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-11-22 18:15:30,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 18:15:30,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:30,243 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, 1, 1, 1, 1, 1] [2023-11-22 18:15:30,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 18:15:30,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:30,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:30,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1903088773, now seen corresponding path program 1 times [2023-11-22 18:15:30,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:30,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568565362] [2023-11-22 18:15:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:30,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:15:30,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:30,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568565362] [2023-11-22 18:15:30,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568565362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:15:30,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:15:30,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 18:15:30,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396189686] [2023-11-22 18:15:30,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:15:30,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 18:15:30,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:30,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 18:15:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:15:30,317 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 18:15:30,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:30,333 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-11-22 18:15:30,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 18:15:30,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) Word has length 25 [2023-11-22 18:15:30,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:30,334 INFO L225 Difference]: With dead ends: 42 [2023-11-22 18:15:30,334 INFO L226 Difference]: Without dead ends: 29 [2023-11-22 18:15:30,334 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 18:15:30,335 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:30,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:15:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-22 18:15:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-22 18:15:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 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 18:15:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-22 18:15:30,342 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 25 [2023-11-22 18:15:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:30,343 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-22 18:15:30,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 18:15:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-22 18:15:30,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 18:15:30,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:30,344 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, 1, 1, 1, 1, 1] [2023-11-22 18:15:30,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 18:15:30,344 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:30,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:30,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1223030403, now seen corresponding path program 1 times [2023-11-22 18:15:30,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:30,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754439931] [2023-11-22 18:15:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:30,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:15:31,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:31,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754439931] [2023-11-22 18:15:31,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754439931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:31,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905246745] [2023-11-22 18:15:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:31,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:31,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:31,166 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 18:15:31,168 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 18:15:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:31,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-22 18:15:31,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:31,333 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 18:15:31,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-22 18:15:31,413 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 11 [2023-11-22 18:15:31,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:31,439 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 41 treesize of output 18 [2023-11-22 18:15:31,478 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 11 [2023-11-22 18:15:31,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:31,493 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 18 [2023-11-22 18:15:31,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 18:15:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:15:31,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:31,736 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 18:15:31,739 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 18:15:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:15:31,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905246745] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:31,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:31,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-22 18:15:31,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677281218] [2023-11-22 18:15:31,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:31,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 18:15:31,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:31,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 18:15:31,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-22 18:15:31,778 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:15:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:31,978 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2023-11-22 18:15:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 18:15:31,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:15:31,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:31,982 INFO L225 Difference]: With dead ends: 75 [2023-11-22 18:15:31,982 INFO L226 Difference]: Without dead ends: 52 [2023-11-22 18:15:31,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:15:31,983 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 156 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:31,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 56 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:15:31,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-22 18:15:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 31. [2023-11-22 18:15:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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 18:15:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-22 18:15:31,988 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 25 [2023-11-22 18:15:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:31,997 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-22 18:15:31,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:15:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-22 18:15:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-22 18:15:31,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:31,999 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, 1, 1, 1, 1, 1] [2023-11-22 18:15:32,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-22 18:15:32,206 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 18:15:32,206 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:32,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash -488556627, now seen corresponding path program 1 times [2023-11-22 18:15:32,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:32,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968851798] [2023-11-22 18:15:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:32,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:15:32,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:32,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968851798] [2023-11-22 18:15:32,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968851798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:32,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559929219] [2023-11-22 18:15:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:32,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:32,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:32,589 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 18:15:32,612 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 18:15:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:32,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 18:15:32,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:32,726 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 18:15:32,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:32,747 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 30 treesize of output 18 [2023-11-22 18:15:32,780 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 11 [2023-11-22 18:15:32,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:32,794 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 18 [2023-11-22 18:15:32,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 18:15:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:15:32,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:32,962 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 18:15:32,964 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 18:15:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:15:32,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559929219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:32,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:32,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-22 18:15:32,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826034003] [2023-11-22 18:15:32,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:32,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 18:15:32,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:33,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 18:15:33,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-22 18:15:33,001 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 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 18:15:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:33,154 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2023-11-22 18:15:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 18:15:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 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 18:15:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:33,155 INFO L225 Difference]: With dead ends: 66 [2023-11-22 18:15:33,155 INFO L226 Difference]: Without dead ends: 46 [2023-11-22 18:15:33,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:15:33,156 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:33,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 68 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:15:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-22 18:15:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2023-11-22 18:15:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-11-22 18:15:33,160 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2023-11-22 18:15:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:33,161 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-11-22 18:15:33,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 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 18:15:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-11-22 18:15:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-22 18:15:33,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:33,162 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, 1, 1, 1, 1, 1] [2023-11-22 18:15:33,174 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 18:15:33,373 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 18:15:33,374 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:33,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash -867211395, now seen corresponding path program 2 times [2023-11-22 18:15:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:33,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306124997] [2023-11-22 18:15:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:33,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:15:33,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:33,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306124997] [2023-11-22 18:15:33,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306124997] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:33,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676084077] [2023-11-22 18:15:33,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:15:33,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:33,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:33,655 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 18:15:33,682 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 18:15:33,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:15:33,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:15:33,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-22 18:15:33,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:33,740 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 18:15:33,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:33,753 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 25 [2023-11-22 18:15:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:15:33,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:33,869 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 18:15:33,870 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 18:15:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:15:33,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676084077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:33,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:33,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 16 [2023-11-22 18:15:33,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720133345] [2023-11-22 18:15:33,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:33,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 18:15:33,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:33,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 18:15:33,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-22 18:15:33,882 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 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 18:15:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:34,078 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-11-22 18:15:34,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 18:15:34,078 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 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) Word has length 35 [2023-11-22 18:15:34,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:34,079 INFO L225 Difference]: With dead ends: 59 [2023-11-22 18:15:34,079 INFO L226 Difference]: Without dead ends: 57 [2023-11-22 18:15:34,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:15:34,080 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:34,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 100 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:15:34,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-22 18:15:34,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2023-11-22 18:15:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 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 18:15:34,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-11-22 18:15:34,085 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 35 [2023-11-22 18:15:34,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:34,085 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-11-22 18:15:34,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 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 18:15:34,085 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-11-22 18:15:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-22 18:15:34,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:34,086 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:34,100 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 18:15:34,297 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 18:15:34,298 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:34,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:34,299 INFO L85 PathProgramCache]: Analyzing trace with hash 777427373, now seen corresponding path program 3 times [2023-11-22 18:15:34,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:34,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591260499] [2023-11-22 18:15:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:34,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:15:34,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:34,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591260499] [2023-11-22 18:15:34,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591260499] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:34,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675527855] [2023-11-22 18:15:34,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:15:34,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:34,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:34,539 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 18:15:34,540 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 18:15:34,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-22 18:15:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:15:34,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 18:15:34,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:15:34,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:15:34,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675527855] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:34,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:34,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-11-22 18:15:34,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562901875] [2023-11-22 18:15:34,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:34,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-22 18:15:34,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:35,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-22 18:15:35,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2023-11-22 18:15:35,000 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 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 18:15:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:35,199 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2023-11-22 18:15:35,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 18:15:35,200 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-22 18:15:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:35,200 INFO L225 Difference]: With dead ends: 113 [2023-11-22 18:15:35,200 INFO L226 Difference]: Without dead ends: 56 [2023-11-22 18:15:35,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2023-11-22 18:15:35,201 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 135 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:35,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 104 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:15:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-22 18:15:35,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2023-11-22 18:15:35,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 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 18:15:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2023-11-22 18:15:35,207 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 40 [2023-11-22 18:15:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:35,208 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2023-11-22 18:15:35,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 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 18:15:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2023-11-22 18:15:35,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-22 18:15:35,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:35,209 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:35,223 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 18:15:35,423 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 18:15:35,423 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:35,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:35,424 INFO L85 PathProgramCache]: Analyzing trace with hash 495494460, now seen corresponding path program 4 times [2023-11-22 18:15:35,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:35,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491425646] [2023-11-22 18:15:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:35,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:15:35,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:35,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491425646] [2023-11-22 18:15:35,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491425646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:35,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318327427] [2023-11-22 18:15:35,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:15:35,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:35,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:35,870 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 18:15:35,894 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 18:15:35,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:15:35,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:15:35,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 18:15:35,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:36,009 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 18:15:36,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:36,033 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 25 [2023-11-22 18:15:36,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:36,056 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 31 treesize of output 11 [2023-11-22 18:15:36,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:36,069 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 46 treesize of output 33 [2023-11-22 18:15:36,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 18:15:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:15:36,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:36,310 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 59 treesize of output 53 [2023-11-22 18:15:36,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-11-22 18:15:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:15:36,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318327427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:36,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:36,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 26 [2023-11-22 18:15:36,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686655554] [2023-11-22 18:15:36,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:36,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-22 18:15:36,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:36,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-22 18:15:36,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2023-11-22 18:15:36,364 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 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 18:15:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:36,508 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2023-11-22 18:15:36,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 18:15:36,508 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 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) Word has length 49 [2023-11-22 18:15:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:36,509 INFO L225 Difference]: With dead ends: 64 [2023-11-22 18:15:36,509 INFO L226 Difference]: Without dead ends: 55 [2023-11-22 18:15:36,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2023-11-22 18:15:36,510 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:36,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 128 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:15:36,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-22 18:15:36,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2023-11-22 18:15:36,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-11-22 18:15:36,518 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2023-11-22 18:15:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:36,519 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-11-22 18:15:36,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 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 18:15:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-11-22 18:15:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-22 18:15:36,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:36,520 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:36,534 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 18:15:36,734 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 18:15:36,734 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:36,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:36,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1175552830, now seen corresponding path program 5 times [2023-11-22 18:15:36,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:36,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886890290] [2023-11-22 18:15:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:36,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:15:37,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:37,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886890290] [2023-11-22 18:15:37,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886890290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:37,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573241075] [2023-11-22 18:15:37,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:15:37,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:37,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:37,563 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 18:15:37,584 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 18:15:37,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-22 18:15:37,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:15:37,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-22 18:15:37,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:37,997 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 18:15:38,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-22 18:15:38,056 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 18:15:38,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:38,082 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 37 treesize of output 28 [2023-11-22 18:15:38,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:38,118 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 23 treesize of output 25 [2023-11-22 18:15:38,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:38,146 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 52 treesize of output 35 [2023-11-22 18:15:38,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:38,203 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 34 treesize of output 28 [2023-11-22 18:15:38,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:38,216 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 41 treesize of output 35 [2023-11-22 18:15:38,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:38,237 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 34 treesize of output 28 [2023-11-22 18:15:38,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:38,246 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 41 treesize of output 28 [2023-11-22 18:15:38,414 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:38,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 26 treesize of output 10 [2023-11-22 18:15:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:15:38,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:38,714 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 18:15:38,716 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 18:15:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:15:38,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573241075] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:38,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:38,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 12] total 34 [2023-11-22 18:15:38,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079183492] [2023-11-22 18:15:38,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:38,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-22 18:15:38,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:38,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-22 18:15:38,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2023-11-22 18:15:38,774 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 0 states have call successors, (0), 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 18:15:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:40,166 INFO L93 Difference]: Finished difference Result 213 states and 238 transitions. [2023-11-22 18:15:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-22 18:15:40,166 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-22 18:15:40,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:40,167 INFO L225 Difference]: With dead ends: 213 [2023-11-22 18:15:40,168 INFO L226 Difference]: Without dead ends: 204 [2023-11-22 18:15:40,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 76 SyntacticMatches, 10 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=910, Invalid=4346, Unknown=0, NotChecked=0, Total=5256 [2023-11-22 18:15:40,170 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 887 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:40,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 183 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 18:15:40,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-22 18:15:40,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 84. [2023-11-22 18:15:40,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2023-11-22 18:15:40,180 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 49 [2023-11-22 18:15:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:40,180 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2023-11-22 18:15:40,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 0 states have call successors, (0), 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 18:15:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2023-11-22 18:15:40,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-22 18:15:40,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:40,181 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:40,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 18:15:40,387 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 18:15:40,387 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:40,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:40,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1363532885, now seen corresponding path program 6 times [2023-11-22 18:15:40,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:40,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459217526] [2023-11-22 18:15:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:40,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:15:40,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:40,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459217526] [2023-11-22 18:15:40,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459217526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:40,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816446269] [2023-11-22 18:15:40,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:15:40,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:40,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:40,517 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 18:15:40,536 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 18:15:40,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-22 18:15:40,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:15:40,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 18:15:40,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:15:40,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:15:40,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816446269] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:40,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:40,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-22 18:15:40,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297517791] [2023-11-22 18:15:40,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:40,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 18:15:40,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:40,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 18:15:40,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-22 18:15:40,846 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:41,015 INFO L93 Difference]: Finished difference Result 173 states and 186 transitions. [2023-11-22 18:15:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 18:15:41,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-22 18:15:41,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:41,016 INFO L225 Difference]: With dead ends: 173 [2023-11-22 18:15:41,016 INFO L226 Difference]: Without dead ends: 135 [2023-11-22 18:15:41,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2023-11-22 18:15:41,018 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:41,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 47 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:15:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-22 18:15:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 95. [2023-11-22 18:15:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.074468085106383) internal successors, (101), 94 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2023-11-22 18:15:41,037 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 57 [2023-11-22 18:15:41,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:41,037 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2023-11-22 18:15:41,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:41,037 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2023-11-22 18:15:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-22 18:15:41,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:41,038 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:41,053 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 18:15:41,249 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 18:15:41,249 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:41,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:41,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1418828802, now seen corresponding path program 7 times [2023-11-22 18:15:41,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:41,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933413472] [2023-11-22 18:15:41,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:41,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:15:41,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:41,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933413472] [2023-11-22 18:15:41,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933413472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:41,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939410329] [2023-11-22 18:15:41,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:15:41,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:41,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:41,746 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 18:15:41,771 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 18:15:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:41,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-22 18:15:41,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:41,897 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 18:15:41,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:41,922 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 25 [2023-11-22 18:15:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:15:42,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:42,282 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 18:15:42,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-22 18:15:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 18:15:42,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939410329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:42,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:42,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 30 [2023-11-22 18:15:42,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47700134] [2023-11-22 18:15:42,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:42,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-22 18:15:42,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:42,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-22 18:15:42,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-11-22 18:15:42,294 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:42,998 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2023-11-22 18:15:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-22 18:15:42,999 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-22 18:15:42,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:42,999 INFO L225 Difference]: With dead ends: 149 [2023-11-22 18:15:42,999 INFO L226 Difference]: Without dead ends: 147 [2023-11-22 18:15:43,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=2583, Unknown=0, NotChecked=0, Total=2970 [2023-11-22 18:15:43,001 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 118 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:43,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 194 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:15:43,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-22 18:15:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2023-11-22 18:15:43,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.09009009009009) internal successors, (121), 111 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 18:15:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2023-11-22 18:15:43,011 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 59 [2023-11-22 18:15:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:43,011 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2023-11-22 18:15:43,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:43,012 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2023-11-22 18:15:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-22 18:15:43,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:43,024 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:43,038 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 18:15:43,236 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 18:15:43,236 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:43,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1826539578, now seen corresponding path program 8 times [2023-11-22 18:15:43,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:43,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354057108] [2023-11-22 18:15:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:43,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-22 18:15:43,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:43,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354057108] [2023-11-22 18:15:43,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354057108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:43,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333439159] [2023-11-22 18:15:43,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:15:43,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:43,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:43,360 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 18:15:43,396 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 18:15:43,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:15:43,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:15:43,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 18:15:43,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-22 18:15:43,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-22 18:15:43,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333439159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:43,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:43,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-22 18:15:43,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381077917] [2023-11-22 18:15:43,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:43,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 18:15:43,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:43,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 18:15:43,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-22 18:15:43,673 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:43,892 INFO L93 Difference]: Finished difference Result 203 states and 219 transitions. [2023-11-22 18:15:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 18:15:43,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-22 18:15:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:43,893 INFO L225 Difference]: With dead ends: 203 [2023-11-22 18:15:43,893 INFO L226 Difference]: Without dead ends: 133 [2023-11-22 18:15:43,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-11-22 18:15:43,894 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 96 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:43,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 98 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 18:15:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-22 18:15:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2023-11-22 18:15:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0789473684210527) internal successors, (123), 114 states have internal predecessors, (123), 0 states have call successors, (0), 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 18:15:43,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 123 transitions. [2023-11-22 18:15:43,905 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 123 transitions. Word has length 60 [2023-11-22 18:15:43,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:43,905 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 123 transitions. [2023-11-22 18:15:43,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:43,905 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 123 transitions. [2023-11-22 18:15:43,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-22 18:15:43,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:43,906 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:43,918 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 18:15:44,116 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 18:15:44,116 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:44,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:44,117 INFO L85 PathProgramCache]: Analyzing trace with hash -250933029, now seen corresponding path program 9 times [2023-11-22 18:15:44,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:44,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134898254] [2023-11-22 18:15:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:44,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-22 18:15:45,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:45,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134898254] [2023-11-22 18:15:45,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134898254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:45,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025128935] [2023-11-22 18:15:45,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:15:45,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:45,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:45,012 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 18:15:45,039 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 18:15:45,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-22 18:15:45,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:15:45,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-22 18:15:45,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:45,554 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 18:15:45,596 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:45,596 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 30 treesize of output 18 [2023-11-22 18:15:45,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:45,657 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 27 treesize of output 22 [2023-11-22 18:15:45,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:45,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:45,700 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 65 treesize of output 36 [2023-11-22 18:15:45,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:45,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:45,821 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 50 treesize of output 25 [2023-11-22 18:15:45,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:45,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:45,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:45,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:45,847 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 65 treesize of output 47 [2023-11-22 18:15:45,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:45,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:45,900 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 50 treesize of output 25 [2023-11-22 18:15:45,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:45,937 INFO L349 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2023-11-22 18:15:45,938 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 8 case distinctions, treesize of input 65 treesize of output 47 [2023-11-22 18:15:46,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:46,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:46,028 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 50 treesize of output 25 [2023-11-22 18:15:46,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:46,091 INFO L349 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2023-11-22 18:15:46,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 47 [2023-11-22 18:15:46,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:46,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:46,550 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 34 treesize of output 10 [2023-11-22 18:15:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:15:46,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:47,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2023-11-22 18:15:47,339 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 54 treesize of output 50 [2023-11-22 18:15:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:15:47,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025128935] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:47,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:47,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25, 20] total 53 [2023-11-22 18:15:47,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223491837] [2023-11-22 18:15:47,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:47,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-22 18:15:47,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:47,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-22 18:15:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=2413, Unknown=0, NotChecked=0, Total=2756 [2023-11-22 18:15:47,558 INFO L87 Difference]: Start difference. First operand 115 states and 123 transitions. Second operand has 53 states, 53 states have (on average 3.188679245283019) internal successors, (169), 53 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 18:15:53,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:15:54,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:15:55,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:55,871 INFO L93 Difference]: Finished difference Result 284 states and 312 transitions. [2023-11-22 18:15:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-22 18:15:55,871 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.188679245283019) internal successors, (169), 53 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) Word has length 63 [2023-11-22 18:15:55,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:55,872 INFO L225 Difference]: With dead ends: 284 [2023-11-22 18:15:55,872 INFO L226 Difference]: Without dead ends: 231 [2023-11-22 18:15:55,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 88 SyntacticMatches, 10 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4820 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2333, Invalid=14437, Unknown=0, NotChecked=0, Total=16770 [2023-11-22 18:15:55,876 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 957 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 422 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 2964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:55,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 592 Invalid, 2964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 2540 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2023-11-22 18:15:55,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-22 18:15:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 111. [2023-11-22 18:15:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 110 states have internal predecessors, (119), 0 states have call successors, (0), 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 18:15:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2023-11-22 18:15:55,889 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 63 [2023-11-22 18:15:55,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:55,889 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2023-11-22 18:15:55,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.188679245283019) internal successors, (169), 53 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 18:15:55,889 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2023-11-22 18:15:55,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-22 18:15:55,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:55,890 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:55,910 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 18:15:56,092 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 18:15:56,092 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:56,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:56,093 INFO L85 PathProgramCache]: Analyzing trace with hash -212449844, now seen corresponding path program 10 times [2023-11-22 18:15:56,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:56,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869016386] [2023-11-22 18:15:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:56,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 73 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 18:15:56,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:56,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869016386] [2023-11-22 18:15:56,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869016386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:56,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647964535] [2023-11-22 18:15:56,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:15:56,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:56,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:56,397 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 18:15:56,419 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 18:15:56,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:15:56,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:15:56,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-22 18:15:56,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 99 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 18:15:56,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 99 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 18:15:57,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647964535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:57,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:57,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2023-11-22 18:15:57,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660760139] [2023-11-22 18:15:57,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:57,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-22 18:15:57,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:57,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-22 18:15:57,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2023-11-22 18:15:57,155 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 40 states, 40 states have (on average 4.1) internal successors, (164), 40 states have internal predecessors, (164), 0 states have call successors, (0), 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 18:15:57,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:57,471 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2023-11-22 18:15:57,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 18:15:57,471 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.1) internal successors, (164), 40 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-22 18:15:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:57,472 INFO L225 Difference]: With dead ends: 161 [2023-11-22 18:15:57,472 INFO L226 Difference]: Without dead ends: 104 [2023-11-22 18:15:57,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1616, Unknown=0, NotChecked=0, Total=2162 [2023-11-22 18:15:57,473 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 255 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:57,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 189 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 18:15:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-22 18:15:57,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2023-11-22 18:15:57,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 101 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 18:15:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2023-11-22 18:15:57,486 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 64 [2023-11-22 18:15:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:57,486 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2023-11-22 18:15:57,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.1) internal successors, (164), 40 states have internal predecessors, (164), 0 states have call successors, (0), 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 18:15:57,486 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2023-11-22 18:15:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-22 18:15:57,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:57,490 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:57,505 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 18:15:57,705 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 18:15:57,706 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:57,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:57,706 INFO L85 PathProgramCache]: Analyzing trace with hash -102936229, now seen corresponding path program 11 times [2023-11-22 18:15:57,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:57,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736084650] [2023-11-22 18:15:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:57,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 37 proven. 94 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:15:58,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:58,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736084650] [2023-11-22 18:15:58,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736084650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:58,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352252086] [2023-11-22 18:15:58,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:15:58,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:58,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:58,322 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 18:15:58,326 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 18:16:00,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-22 18:16:00,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:00,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-22 18:16:00,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:00,299 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 18:16:00,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-22 18:16:00,373 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 18:16:00,398 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:00,399 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 37 treesize of output 28 [2023-11-22 18:16:00,432 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:00,433 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 18:16:00,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:00,469 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 44 treesize of output 38 [2023-11-22 18:16:00,511 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:00,511 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 34 treesize of output 35 [2023-11-22 18:16:00,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:00,545 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 63 treesize of output 45 [2023-11-22 18:16:00,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:00,624 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 45 treesize of output 38 [2023-11-22 18:16:00,637 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:00,638 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 52 treesize of output 45 [2023-11-22 18:16:00,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:00,697 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 45 treesize of output 38 [2023-11-22 18:16:00,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:00,710 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 52 treesize of output 45 [2023-11-22 18:16:00,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:00,753 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 53 treesize of output 38 [2023-11-22 18:16:00,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:00,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:00,818 INFO L349 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2023-11-22 18:16:00,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 68 treesize of output 60 [2023-11-22 18:16:01,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:01,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 13 [2023-11-22 18:16:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:16:01,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:01,863 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 18:16:01,864 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 18:16:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 110 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-22 18:16:01,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352252086] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:01,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:01,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 17] total 50 [2023-11-22 18:16:01,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041339694] [2023-11-22 18:16:01,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:01,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-22 18:16:01,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:01,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-22 18:16:01,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2242, Unknown=0, NotChecked=0, Total=2450 [2023-11-22 18:16:01,961 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 50 states, 50 states have (on average 4.06) internal successors, (203), 50 states have internal predecessors, (203), 0 states have call successors, (0), 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 18:16:05,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:05,213 INFO L93 Difference]: Finished difference Result 235 states and 262 transitions. [2023-11-22 18:16:05,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-22 18:16:05,214 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.06) internal successors, (203), 50 states have internal predecessors, (203), 0 states have call successors, (0), 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 18:16:05,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:05,215 INFO L225 Difference]: With dead ends: 235 [2023-11-22 18:16:05,215 INFO L226 Difference]: Without dead ends: 226 [2023-11-22 18:16:05,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4008 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1546, Invalid=11564, Unknown=0, NotChecked=0, Total=13110 [2023-11-22 18:16:05,220 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 624 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 2641 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 2641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:05,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 410 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 2641 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-22 18:16:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-22 18:16:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 163. [2023-11-22 18:16:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0740740740740742) internal successors, (174), 162 states have internal predecessors, (174), 0 states have call successors, (0), 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 18:16:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 174 transitions. [2023-11-22 18:16:05,259 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 174 transitions. Word has length 73 [2023-11-22 18:16:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:05,259 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 174 transitions. [2023-11-22 18:16:05,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.06) internal successors, (203), 50 states have internal predecessors, (203), 0 states have call successors, (0), 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 18:16:05,260 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 174 transitions. [2023-11-22 18:16:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-22 18:16:05,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:05,260 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:05,268 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 18:16:05,460 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 18:16:05,461 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:05,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:05,461 INFO L85 PathProgramCache]: Analyzing trace with hash -561138339, now seen corresponding path program 12 times [2023-11-22 18:16:05,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:05,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542244905] [2023-11-22 18:16:05,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:05,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:16:05,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:05,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542244905] [2023-11-22 18:16:05,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542244905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:05,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980754745] [2023-11-22 18:16:05,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:16:05,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:05,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:05,994 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 18:16:06,020 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 18:16:06,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-22 18:16:06,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:06,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-22 18:16:06,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:06,498 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 18:16:06,504 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:06,504 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 40 treesize of output 31 [2023-11-22 18:16:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 18:16:06,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:06,818 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 18:16:06,819 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 18:16:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 18:16:06,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980754745] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:06,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:06,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2023-11-22 18:16:06,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827235399] [2023-11-22 18:16:06,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:06,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-22 18:16:06,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:06,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-22 18:16:06,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2023-11-22 18:16:06,828 INFO L87 Difference]: Start difference. First operand 163 states and 174 transitions. Second operand has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:16:07,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:07,939 INFO L93 Difference]: Finished difference Result 287 states and 308 transitions. [2023-11-22 18:16:07,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-22 18:16:07,939 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-11-22 18:16:07,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:07,940 INFO L225 Difference]: With dead ends: 287 [2023-11-22 18:16:07,940 INFO L226 Difference]: Without dead ends: 285 [2023-11-22 18:16:07,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=5178, Unknown=0, NotChecked=0, Total=5700 [2023-11-22 18:16:07,942 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 121 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:07,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 282 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 18:16:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-22 18:16:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 180. [2023-11-22 18:16:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0837988826815643) internal successors, (194), 179 states have internal predecessors, (194), 0 states have call successors, (0), 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 18:16:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2023-11-22 18:16:07,965 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 83 [2023-11-22 18:16:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:07,966 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2023-11-22 18:16:07,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:16:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2023-11-22 18:16:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-22 18:16:07,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:07,967 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:07,976 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 18:16:08,176 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 18:16:08,176 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:08,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:08,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1237452851, now seen corresponding path program 13 times [2023-11-22 18:16:08,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:08,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928632253] [2023-11-22 18:16:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:08,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 175 proven. 53 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 18:16:08,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:08,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928632253] [2023-11-22 18:16:08,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928632253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:08,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073633544] [2023-11-22 18:16:08,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:16:08,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:08,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:08,634 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 18:16:08,635 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 18:16:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:08,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-22 18:16:08,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 216 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 18:16:09,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 216 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 18:16:09,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073633544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:09,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:09,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 51 [2023-11-22 18:16:09,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732840868] [2023-11-22 18:16:09,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:09,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-22 18:16:09,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:09,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-22 18:16:09,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=1934, Unknown=0, NotChecked=0, Total=2550 [2023-11-22 18:16:09,697 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand has 51 states, 51 states have (on average 4.254901960784314) internal successors, (217), 51 states have internal predecessors, (217), 0 states have call successors, (0), 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 18:16:10,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:10,120 INFO L93 Difference]: Finished difference Result 287 states and 305 transitions. [2023-11-22 18:16:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-22 18:16:10,120 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.254901960784314) internal successors, (217), 51 states have internal predecessors, (217), 0 states have call successors, (0), 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 88 [2023-11-22 18:16:10,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:10,121 INFO L225 Difference]: With dead ends: 287 [2023-11-22 18:16:10,121 INFO L226 Difference]: Without dead ends: 207 [2023-11-22 18:16:10,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=825, Invalid=2597, Unknown=0, NotChecked=0, Total=3422 [2023-11-22 18:16:10,123 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 246 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:10,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 273 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:16:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-22 18:16:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 201. [2023-11-22 18:16:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.065) internal successors, (213), 200 states have internal predecessors, (213), 0 states have call successors, (0), 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 18:16:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 213 transitions. [2023-11-22 18:16:10,147 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 213 transitions. Word has length 88 [2023-11-22 18:16:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:10,148 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 213 transitions. [2023-11-22 18:16:10,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.254901960784314) internal successors, (217), 51 states have internal predecessors, (217), 0 states have call successors, (0), 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 18:16:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 213 transitions. [2023-11-22 18:16:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-22 18:16:10,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:10,149 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:10,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-22 18:16:10,355 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 18:16:10,355 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:10,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:10,356 INFO L85 PathProgramCache]: Analyzing trace with hash -451588813, now seen corresponding path program 14 times [2023-11-22 18:16:10,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:10,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531406987] [2023-11-22 18:16:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:10,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-22 18:16:10,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:10,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531406987] [2023-11-22 18:16:10,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531406987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:10,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126463333] [2023-11-22 18:16:10,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:16:10,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:10,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:10,540 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 18:16:10,541 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 18:16:10,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:16:10,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:10,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 18:16:10,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 35 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-22 18:16:10,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 35 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-22 18:16:10,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126463333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:10,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:10,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 22 [2023-11-22 18:16:10,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683039272] [2023-11-22 18:16:10,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:10,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-22 18:16:10,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:10,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-22 18:16:10,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-11-22 18:16:10,984 INFO L87 Difference]: Start difference. First operand 201 states and 213 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 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 18:16:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:11,615 INFO L93 Difference]: Finished difference Result 359 states and 386 transitions. [2023-11-22 18:16:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-22 18:16:11,615 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 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 90 [2023-11-22 18:16:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:11,616 INFO L225 Difference]: With dead ends: 359 [2023-11-22 18:16:11,616 INFO L226 Difference]: Without dead ends: 207 [2023-11-22 18:16:11,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 168 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=537, Invalid=1815, Unknown=0, NotChecked=0, Total=2352 [2023-11-22 18:16:11,617 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 258 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:11,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 311 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:16:11,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-22 18:16:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 190. [2023-11-22 18:16:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.0740740740740742) internal successors, (203), 189 states have internal predecessors, (203), 0 states have call successors, (0), 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 18:16:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 203 transitions. [2023-11-22 18:16:11,646 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 203 transitions. Word has length 90 [2023-11-22 18:16:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:11,646 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 203 transitions. [2023-11-22 18:16:11,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 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 18:16:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 203 transitions. [2023-11-22 18:16:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-22 18:16:11,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:11,647 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:11,659 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 18:16:11,850 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 18:16:11,850 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:11,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:11,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1324395076, now seen corresponding path program 15 times [2023-11-22 18:16:11,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:11,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809288136] [2023-11-22 18:16:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:11,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 38 proven. 35 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-22 18:16:12,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:12,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809288136] [2023-11-22 18:16:12,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809288136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471867838] [2023-11-22 18:16:12,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:16:12,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:12,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:12,109 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 18:16:12,112 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 18:16:12,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-22 18:16:12,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:12,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 18:16:12,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 51 proven. 22 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-22 18:16:13,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 51 proven. 22 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-22 18:16:13,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471867838] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:13,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:13,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2023-11-22 18:16:13,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139743479] [2023-11-22 18:16:13,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:13,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 18:16:13,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:13,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 18:16:13,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:16:13,247 INFO L87 Difference]: Start difference. First operand 190 states and 203 transitions. Second operand has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 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 18:16:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:13,863 INFO L93 Difference]: Finished difference Result 430 states and 458 transitions. [2023-11-22 18:16:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-22 18:16:13,863 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 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 93 [2023-11-22 18:16:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:13,864 INFO L225 Difference]: With dead ends: 430 [2023-11-22 18:16:13,864 INFO L226 Difference]: Without dead ends: 295 [2023-11-22 18:16:13,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 166 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=2167, Unknown=0, NotChecked=0, Total=2756 [2023-11-22 18:16:13,866 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 547 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:13,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 211 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:16:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-22 18:16:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 215. [2023-11-22 18:16:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0560747663551402) internal successors, (226), 214 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 18:16:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 226 transitions. [2023-11-22 18:16:13,895 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 226 transitions. Word has length 93 [2023-11-22 18:16:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:13,895 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 226 transitions. [2023-11-22 18:16:13,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 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 18:16:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 226 transitions. [2023-11-22 18:16:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-22 18:16:13,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:13,897 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:13,912 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 18:16:14,104 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 18:16:14,104 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:14,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash -91407268, now seen corresponding path program 16 times [2023-11-22 18:16:14,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:14,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456726929] [2023-11-22 18:16:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:14,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 18 proven. 220 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-22 18:16:15,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:15,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456726929] [2023-11-22 18:16:15,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456726929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:15,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953139509] [2023-11-22 18:16:15,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:16:15,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:15,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:15,597 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 18:16:15,619 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 18:16:15,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:16:15,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:15,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-22 18:16:15,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:15,926 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 18:16:15,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:15,954 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 25 [2023-11-22 18:16:15,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:15,990 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 31 treesize of output 11 [2023-11-22 18:16:16,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:16,001 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 46 treesize of output 33 [2023-11-22 18:16:16,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 18:16:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 58 proven. 195 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-22 18:16:16,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:16,853 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 59 treesize of output 53 [2023-11-22 18:16:16,856 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 18:16:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 58 proven. 178 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-22 18:16:17,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953139509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:17,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:17,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 19] total 52 [2023-11-22 18:16:17,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834043329] [2023-11-22 18:16:17,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:17,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-22 18:16:17,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:17,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-22 18:16:17,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2430, Unknown=0, NotChecked=0, Total=2652 [2023-11-22 18:16:17,026 INFO L87 Difference]: Start difference. First operand 215 states and 226 transitions. Second operand has 52 states, 52 states have (on average 4.384615384615385) internal successors, (228), 52 states have internal predecessors, (228), 0 states have call successors, (0), 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 18:16:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:19,968 INFO L93 Difference]: Finished difference Result 306 states and 326 transitions. [2023-11-22 18:16:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-22 18:16:19,969 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.384615384615385) internal successors, (228), 52 states have internal predecessors, (228), 0 states have call successors, (0), 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 97 [2023-11-22 18:16:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:19,970 INFO L225 Difference]: With dead ends: 306 [2023-11-22 18:16:19,970 INFO L226 Difference]: Without dead ends: 297 [2023-11-22 18:16:19,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 171 SyntacticMatches, 9 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1243, Invalid=11639, Unknown=0, NotChecked=0, Total=12882 [2023-11-22 18:16:19,971 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 463 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 3570 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 3750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 3570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:19,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 804 Invalid, 3750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 3570 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-22 18:16:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-22 18:16:20,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 220. [2023-11-22 18:16:20,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0502283105022832) internal successors, (230), 219 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 18:16:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 230 transitions. [2023-11-22 18:16:20,003 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 230 transitions. Word has length 97 [2023-11-22 18:16:20,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:20,003 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 230 transitions. [2023-11-22 18:16:20,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.384615384615385) internal successors, (228), 52 states have internal predecessors, (228), 0 states have call successors, (0), 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 18:16:20,004 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 230 transitions. [2023-11-22 18:16:20,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-22 18:16:20,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:20,005 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:20,017 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 18:16:20,220 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 18:16:20,221 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:20,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1642171244, now seen corresponding path program 17 times [2023-11-22 18:16:20,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:20,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992336474] [2023-11-22 18:16:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:20,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 289 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 18:16:21,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:21,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992336474] [2023-11-22 18:16:21,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992336474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:21,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226146600] [2023-11-22 18:16:21,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:16:21,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:21,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:21,314 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 18:16:21,344 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 18:16:24,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-22 18:16:24,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:24,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-22 18:16:24,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:25,062 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 18:16:25,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:25,098 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 30 treesize of output 18 [2023-11-22 18:16:25,160 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 11 [2023-11-22 18:16:25,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:25,170 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 25 [2023-11-22 18:16:25,210 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 11 [2023-11-22 18:16:25,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:25,219 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 25 [2023-11-22 18:16:25,253 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 11 [2023-11-22 18:16:25,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:25,264 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 25 [2023-11-22 18:16:25,278 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 11 [2023-11-22 18:16:25,288 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:25,288 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 18 [2023-11-22 18:16:25,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 18:16:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 310 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:16:25,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:26,506 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 18:16:26,512 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 18:16:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 267 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-22 18:16:26,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226146600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:26,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:26,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 55 [2023-11-22 18:16:26,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601947044] [2023-11-22 18:16:26,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:26,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-22 18:16:26,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:26,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-22 18:16:26,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2781, Unknown=0, NotChecked=0, Total=2970 [2023-11-22 18:16:26,706 INFO L87 Difference]: Start difference. First operand 220 states and 230 transitions. Second operand has 55 states, 55 states have (on average 4.890909090909091) internal successors, (269), 55 states have internal predecessors, (269), 0 states have call successors, (0), 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 18:16:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:30,389 INFO L93 Difference]: Finished difference Result 391 states and 422 transitions. [2023-11-22 18:16:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-22 18:16:30,391 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.890909090909091) internal successors, (269), 55 states have internal predecessors, (269), 0 states have call successors, (0), 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 102 [2023-11-22 18:16:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:30,392 INFO L225 Difference]: With dead ends: 391 [2023-11-22 18:16:30,392 INFO L226 Difference]: Without dead ends: 372 [2023-11-22 18:16:30,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 171 SyntacticMatches, 13 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3457 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1268, Invalid=13494, Unknown=0, NotChecked=0, Total=14762 [2023-11-22 18:16:30,394 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 911 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 3894 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 4272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 3894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:30,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 751 Invalid, 4272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 3894 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-22 18:16:30,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-22 18:16:30,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 248. [2023-11-22 18:16:30,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.0526315789473684) internal successors, (260), 247 states have internal predecessors, (260), 0 states have call successors, (0), 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 18:16:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 260 transitions. [2023-11-22 18:16:30,433 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 260 transitions. Word has length 102 [2023-11-22 18:16:30,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:30,434 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 260 transitions. [2023-11-22 18:16:30,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.890909090909091) internal successors, (269), 55 states have internal predecessors, (269), 0 states have call successors, (0), 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 18:16:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 260 transitions. [2023-11-22 18:16:30,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-22 18:16:30,434 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:30,434 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:30,443 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 18:16:30,635 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 18:16:30,635 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:30,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:30,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1787260130, now seen corresponding path program 18 times [2023-11-22 18:16:30,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:30,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395525722] [2023-11-22 18:16:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:30,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 18:16:31,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395525722] [2023-11-22 18:16:31,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395525722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688209514] [2023-11-22 18:16:31,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:16:31,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:31,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:31,337 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 18:16:31,338 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 18:16:32,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-22 18:16:32,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:32,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-22 18:16:32,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:32,363 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 18:16:32,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:32,367 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 40 treesize of output 31 [2023-11-22 18:16:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-22 18:16:32,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:32,781 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 18:16:32,783 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 18:16:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-22 18:16:32,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688209514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:32,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:32,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 34 [2023-11-22 18:16:32,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927681675] [2023-11-22 18:16:32,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:32,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-22 18:16:32,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:32,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-22 18:16:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2023-11-22 18:16:32,795 INFO L87 Difference]: Start difference. First operand 248 states and 260 transitions. Second operand has 34 states, 34 states have (on average 4.852941176470588) internal successors, (165), 34 states have internal predecessors, (165), 0 states have call successors, (0), 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 18:16:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:35,158 INFO L93 Difference]: Finished difference Result 395 states and 419 transitions. [2023-11-22 18:16:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-11-22 18:16:35,158 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.852941176470588) internal successors, (165), 34 states have internal predecessors, (165), 0 states have call successors, (0), 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 107 [2023-11-22 18:16:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:35,161 INFO L225 Difference]: With dead ends: 395 [2023-11-22 18:16:35,161 INFO L226 Difference]: Without dead ends: 393 [2023-11-22 18:16:35,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4891 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1025, Invalid=13737, Unknown=0, NotChecked=0, Total=14762 [2023-11-22 18:16:35,163 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 190 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 3077 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 3202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:35,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 428 Invalid, 3202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3077 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-22 18:16:35,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-11-22 18:16:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 253. [2023-11-22 18:16:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.0555555555555556) internal successors, (266), 252 states have internal predecessors, (266), 0 states have call successors, (0), 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 18:16:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 266 transitions. [2023-11-22 18:16:35,204 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 266 transitions. Word has length 107 [2023-11-22 18:16:35,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:35,205 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 266 transitions. [2023-11-22 18:16:35,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.852941176470588) internal successors, (165), 34 states have internal predecessors, (165), 0 states have call successors, (0), 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 18:16:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 266 transitions. [2023-11-22 18:16:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-22 18:16:35,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:35,206 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:35,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-22 18:16:35,413 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 18:16:35,413 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:35,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:35,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1748536531, now seen corresponding path program 19 times [2023-11-22 18:16:35,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:35,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460994691] [2023-11-22 18:16:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:35,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 54 proven. 67 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-22 18:16:35,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:35,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460994691] [2023-11-22 18:16:35,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460994691] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:35,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497918363] [2023-11-22 18:16:35,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:16:35,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:35,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:35,753 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 18:16:35,756 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 18:16:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:35,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 18:16:35,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-22 18:16:36,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-22 18:16:36,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497918363] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:36,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:36,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-22 18:16:36,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174677061] [2023-11-22 18:16:36,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:36,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-22 18:16:36,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-22 18:16:36,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-22 18:16:36,411 INFO L87 Difference]: Start difference. First operand 253 states and 266 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 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 18:16:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:37,466 INFO L93 Difference]: Finished difference Result 578 states and 607 transitions. [2023-11-22 18:16:37,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-22 18:16:37,467 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 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) Word has length 108 [2023-11-22 18:16:37,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:37,468 INFO L225 Difference]: With dead ends: 578 [2023-11-22 18:16:37,469 INFO L226 Difference]: Without dead ends: 486 [2023-11-22 18:16:37,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 192 SyntacticMatches, 15 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1044, Invalid=4068, Unknown=0, NotChecked=0, Total=5112 [2023-11-22 18:16:37,470 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 924 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:37,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 228 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:16:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-11-22 18:16:37,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 263. [2023-11-22 18:16:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0534351145038168) internal successors, (276), 262 states have internal predecessors, (276), 0 states have call successors, (0), 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 18:16:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 276 transitions. [2023-11-22 18:16:37,513 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 276 transitions. Word has length 108 [2023-11-22 18:16:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:37,513 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 276 transitions. [2023-11-22 18:16:37,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 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 18:16:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 276 transitions. [2023-11-22 18:16:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-22 18:16:37,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:37,514 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:37,526 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 18:16:37,725 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 18:16:37,726 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:37,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:37,726 INFO L85 PathProgramCache]: Analyzing trace with hash -384123966, now seen corresponding path program 20 times [2023-11-22 18:16:37,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:37,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662188490] [2023-11-22 18:16:37,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:37,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 35 proven. 86 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-22 18:16:38,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:38,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662188490] [2023-11-22 18:16:38,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662188490] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:38,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653115196] [2023-11-22 18:16:38,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:16:38,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:38,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:38,052 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 18:16:38,080 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 18:16:38,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:16:38,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:38,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 18:16:38,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-22 18:16:38,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-22 18:16:38,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653115196] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:38,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:38,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-22 18:16:38,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532210616] [2023-11-22 18:16:38,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:38,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-22 18:16:38,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:38,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-22 18:16:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-22 18:16:38,786 INFO L87 Difference]: Start difference. First operand 263 states and 276 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 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 18:16:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:39,383 INFO L93 Difference]: Finished difference Result 444 states and 464 transitions. [2023-11-22 18:16:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-22 18:16:39,384 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 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) Word has length 111 [2023-11-22 18:16:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:39,385 INFO L225 Difference]: With dead ends: 444 [2023-11-22 18:16:39,385 INFO L226 Difference]: Without dead ends: 317 [2023-11-22 18:16:39,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 198 SyntacticMatches, 15 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2023-11-22 18:16:39,386 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 201 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:39,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 139 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:16:39,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-22 18:16:39,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 266. [2023-11-22 18:16:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.049056603773585) internal successors, (278), 265 states have internal predecessors, (278), 0 states have call successors, (0), 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 18:16:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 278 transitions. [2023-11-22 18:16:39,430 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 278 transitions. Word has length 111 [2023-11-22 18:16:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:39,431 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 278 transitions. [2023-11-22 18:16:39,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 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 18:16:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 278 transitions. [2023-11-22 18:16:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-22 18:16:39,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:39,432 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:39,444 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 18:16:39,644 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 18:16:39,644 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:39,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:39,644 INFO L85 PathProgramCache]: Analyzing trace with hash 703367852, now seen corresponding path program 21 times [2023-11-22 18:16:39,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:39,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436433035] [2023-11-22 18:16:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:39,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 322 proven. 78 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-22 18:16:40,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:40,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436433035] [2023-11-22 18:16:40,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436433035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:40,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739078522] [2023-11-22 18:16:40,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:16:40,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:40,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:40,207 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 18:16:40,210 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 18:16:41,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-22 18:16:41,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:41,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-22 18:16:41,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:41,605 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 13 treesize of output 9 [2023-11-22 18:16:41,628 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:41,628 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 40 treesize of output 31 [2023-11-22 18:16:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 79 proven. 319 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-22 18:16:42,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:42,490 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 18:16:42,499 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 18:16:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 79 proven. 319 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-22 18:16:42,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739078522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:42,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:42,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 60 [2023-11-22 18:16:42,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192931533] [2023-11-22 18:16:42,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:42,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-22 18:16:42,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:42,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-22 18:16:42,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2023-11-22 18:16:42,662 INFO L87 Difference]: Start difference. First operand 266 states and 278 transitions. Second operand has 60 states, 60 states have (on average 4.433333333333334) internal successors, (266), 60 states have internal predecessors, (266), 0 states have call successors, (0), 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 18:16:46,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:46,315 INFO L93 Difference]: Finished difference Result 450 states and 474 transitions. [2023-11-22 18:16:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-22 18:16:46,315 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 4.433333333333334) internal successors, (266), 60 states have internal predecessors, (266), 0 states have call successors, (0), 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 112 [2023-11-22 18:16:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:46,317 INFO L225 Difference]: With dead ends: 450 [2023-11-22 18:16:46,317 INFO L226 Difference]: Without dead ends: 351 [2023-11-22 18:16:46,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5984 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1916, Invalid=18106, Unknown=0, NotChecked=0, Total=20022 [2023-11-22 18:16:46,319 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1015 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 3395 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 3626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 3395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:46,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 1182 Invalid, 3626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 3395 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-22 18:16:46,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-11-22 18:16:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 238. [2023-11-22 18:16:46,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.0379746835443038) internal successors, (246), 237 states have internal predecessors, (246), 0 states have call successors, (0), 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 18:16:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 246 transitions. [2023-11-22 18:16:46,379 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 246 transitions. Word has length 112 [2023-11-22 18:16:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:46,379 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 246 transitions. [2023-11-22 18:16:46,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 4.433333333333334) internal successors, (266), 60 states have internal predecessors, (266), 0 states have call successors, (0), 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 18:16:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 246 transitions. [2023-11-22 18:16:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-22 18:16:46,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:46,380 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:46,400 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 18:16:46,593 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 18:16:46,593 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:46,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:46,593 INFO L85 PathProgramCache]: Analyzing trace with hash 169516429, now seen corresponding path program 22 times [2023-11-22 18:16:46,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:46,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068183048] [2023-11-22 18:16:46,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:46,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 28 proven. 245 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:16:50,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:50,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068183048] [2023-11-22 18:16:50,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068183048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:50,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886383215] [2023-11-22 18:16:50,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:16:50,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:50,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:50,398 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 18:16:50,399 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 18:16:50,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:16:50,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:50,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-22 18:16:50,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:51,262 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 18:16:51,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:51,318 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 30 treesize of output 18 [2023-11-22 18:16:51,378 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 18:16:51,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:51,439 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 37 treesize of output 28 [2023-11-22 18:16:51,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:51,524 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 18:16:51,596 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:51,596 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 44 treesize of output 38 [2023-11-22 18:16:51,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:51,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:51,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:51,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:51,683 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 37 treesize of output 42 [2023-11-22 18:16:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:51,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:51,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:51,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:51,770 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 71 treesize of output 56 [2023-11-22 18:16:51,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:51,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:51,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:51,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:51,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:51,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:51,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:51,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:51,900 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 64 treesize of output 56 [2023-11-22 18:16:52,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:52,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:52,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:52,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:52,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:52,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:52,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:52,016 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 114 treesize of output 70 [2023-11-22 18:16:59,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:59,588 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 91 treesize of output 59 [2023-11-22 18:16:59,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:59,698 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 98 treesize of output 73 [2023-11-22 18:16:59,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:59,849 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 91 treesize of output 59 [2023-11-22 18:16:59,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:59,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:59,890 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 98 treesize of output 73 [2023-11-22 18:17:00,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:00,042 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 91 treesize of output 59 [2023-11-22 18:17:00,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:00,085 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 98 treesize of output 66 [2023-11-22 18:17:00,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:00,233 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 75 treesize of output 59 [2023-11-22 18:17:00,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:00,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:00,555 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 82 treesize of output 66 [2023-11-22 18:17:06,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:06,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:06,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:06,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:06,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:06,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:06,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:06,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:06,312 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 99 treesize of output 59 [2023-11-22 18:17:12,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:12,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:12,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:12,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:12,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:12,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:12,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:12,933 INFO L349 Elim1Store]: treesize reduction 128, result has 25.6 percent of original size [2023-11-22 18:17:12,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 26 case distinctions, treesize of input 114 treesize of output 81 [2023-11-22 18:17:18,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:18,685 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 99 treesize of output 59 [2023-11-22 18:17:18,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,796 INFO L349 Elim1Store]: treesize reduction 128, result has 25.6 percent of original size [2023-11-22 18:17:18,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 26 case distinctions, treesize of input 114 treesize of output 81 [2023-11-22 18:17:18,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:18,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:18,876 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 99 treesize of output 59 [2023-11-22 18:17:26,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:26,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:26,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:26,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:26,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:26,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:26,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:26,211 INFO L349 Elim1Store]: treesize reduction 128, result has 25.6 percent of original size [2023-11-22 18:17:26,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 26 case distinctions, treesize of input 114 treesize of output 81 [2023-11-22 18:17:41,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:41,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:41,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:41,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:41,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:41,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:41,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:41,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:41,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 83 treesize of output 19 [2023-11-22 18:17:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 17 proven. 314 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:17:41,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:18:16,653 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 248 treesize of output 232 [2023-11-22 18:18:16,656 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 474 treesize of output 470 [2023-11-22 18:18:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 25 proven. 221 refuted. 1 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-22 18:18:17,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886383215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:18:17,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:18:17,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38, 28] total 94 [2023-11-22 18:18:17,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112047312] [2023-11-22 18:18:17,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:18:17,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-11-22 18:18:17,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:18:17,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-11-22 18:18:17,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=723, Invalid=7992, Unknown=27, NotChecked=0, Total=8742 [2023-11-22 18:18:17,035 INFO L87 Difference]: Start difference. First operand 238 states and 246 transitions. Second operand has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 94 states have internal predecessors, (280), 0 states have call successors, (0), 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 18:18:31,809 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 18:18:33,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:18:35,823 WARN L539 Checker$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 18:18:39,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:18:41,023 WARN L539 Checker$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 18:18:43,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:18:46,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:18:48,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:18:50,396 WARN L539 Checker$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 18:18:52,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:18:54,510 WARN L539 Checker$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 18:18:56,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:18:58,613 WARN L539 Checker$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 18:19:00,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:19:02,629 WARN L539 Checker$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 18:19:05,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:19:07,391 WARN L539 Checker$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 18:19:09,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:19:11,921 WARN L539 Checker$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 18:19:13,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:19:16,163 WARN L539 Checker$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 18:19:18,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:19:20,172 WARN L539 Checker$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 18:19:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:19:35,211 INFO L93 Difference]: Finished difference Result 595 states and 634 transitions. [2023-11-22 18:19:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2023-11-22 18:19:35,212 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 94 states have internal predecessors, (280), 0 states have call successors, (0), 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 114 [2023-11-22 18:19:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:19:35,213 INFO L225 Difference]: With dead ends: 595 [2023-11-22 18:19:35,213 INFO L226 Difference]: Without dead ends: 566 [2023-11-22 18:19:35,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 158 SyntacticMatches, 27 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31907 ImplicationChecksByTransitivity, 104.9s TimeCoverageRelationStatistics Valid=9326, Invalid=85810, Unknown=36, NotChecked=0, Total=95172 [2023-11-22 18:19:35,218 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 4130 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 7230 mSolverCounterSat, 1824 mSolverCounterUnsat, 37 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4130 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 9091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1824 IncrementalHoareTripleChecker+Valid, 7230 IncrementalHoareTripleChecker+Invalid, 37 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:19:35,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4130 Valid, 1292 Invalid, 9091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1824 Valid, 7230 Invalid, 37 Unknown, 0 Unchecked, 57.1s Time] [2023-11-22 18:19:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-11-22 18:19:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 268. [2023-11-22 18:19:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.0337078651685394) internal successors, (276), 267 states have internal predecessors, (276), 0 states have call successors, (0), 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 18:19:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 276 transitions. [2023-11-22 18:19:35,269 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 276 transitions. Word has length 114 [2023-11-22 18:19:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:19:35,269 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 276 transitions. [2023-11-22 18:19:35,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 94 states have internal predecessors, (280), 0 states have call successors, (0), 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 18:19:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 276 transitions. [2023-11-22 18:19:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-22 18:19:35,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:19:35,270 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:19:35,284 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 18:19:35,482 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 18:19:35,482 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:19:35,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:19:35,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1515352771, now seen corresponding path program 23 times [2023-11-22 18:19:35,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:19:35,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629316095] [2023-11-22 18:19:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:19:35,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:19:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:19:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 24 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:19:37,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:19:37,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629316095] [2023-11-22 18:19:37,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629316095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:19:37,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098230542] [2023-11-22 18:19:37,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:19:37,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:19:37,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:19:37,468 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 18:19:37,469 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 18:19:43,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-22 18:19:43,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:19:43,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-22 18:19:43,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:19:43,186 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 18:19:43,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-22 18:19:43,253 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 18:19:43,281 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,282 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 37 treesize of output 28 [2023-11-22 18:19:43,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,321 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 18:19:43,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,354 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 44 treesize of output 38 [2023-11-22 18:19:43,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,397 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 18:19:43,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,445 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 51 treesize of output 48 [2023-11-22 18:19:43,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,521 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 18:19:43,564 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,565 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 58 treesize of output 58 [2023-11-22 18:19:43,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,623 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 56 treesize of output 55 [2023-11-22 18:19:43,672 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,672 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 85 treesize of output 65 [2023-11-22 18:19:43,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,780 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 67 treesize of output 58 [2023-11-22 18:19:43,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,820 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 74 treesize of output 65 [2023-11-22 18:19:43,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,884 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 67 treesize of output 58 [2023-11-22 18:19:43,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,922 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 74 treesize of output 65 [2023-11-22 18:19:43,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:43,988 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 67 treesize of output 58 [2023-11-22 18:19:44,003 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:44,003 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 74 treesize of output 65 [2023-11-22 18:19:44,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:44,064 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 67 treesize of output 58 [2023-11-22 18:19:44,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:44,083 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 74 treesize of output 65 [2023-11-22 18:19:44,120 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:44,120 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 67 treesize of output 58 [2023-11-22 18:19:44,135 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:44,135 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 74 treesize of output 58 [2023-11-22 18:19:45,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:45,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 59 treesize of output 19 [2023-11-22 18:19:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 24 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:19:45,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... Killed by 15