/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-tiling/nr5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:55:48,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:55:48,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:55:48,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 18:55:48,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 18:55:48,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 18:55:48,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 18:55:48,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 18:55:48,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 18:55:48,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 18:55:48,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 18:55:48,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 18:55:48,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 18:55:48,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 18:55:48,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 18:55:48,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 18:55:48,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 18:55:48,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 18:55:48,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 18:55:48,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 18:55:48,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 18:55:48,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 18:55:48,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 18:55:48,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 18:55:48,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 18:55:48,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:55:48,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:55:48,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:55:48,754 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 18:55:48,775 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:55:48,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:55:48,776 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:55:48,776 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:55:48,777 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:55:48,777 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:55:48,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:55:48,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:55:48,777 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:55:48,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:55:48,778 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:55:48,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:55:48,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:55:48,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:55:48,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:55:48,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:55:48,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:55:48,778 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:55:48,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:55:48,779 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:55:48,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:55:48,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:55:48,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:55:48,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:55:48,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:55:48,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:55:48,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:55:48,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:55:48,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:55:48,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:55:48,780 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:55:48,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:55:48,780 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:55:48,780 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:55:48,780 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:55:48,780 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:55:48,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:55:49,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:55:49,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:55:49,004 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:55:49,004 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:55:49,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/nr5.c [2023-04-01 18:55:49,941 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:55:50,118 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:55:50,119 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/nr5.c [2023-04-01 18:55:50,123 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e463fcede/450eb83fe0254892bef3a4e299789aa9/FLAGf39204721 [2023-04-01 18:55:50,517 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e463fcede/450eb83fe0254892bef3a4e299789aa9 [2023-04-01 18:55:50,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:55:50,519 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:55:50,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:55:50,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:55:50,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:55:50,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:55:50" (1/1) ... [2023-04-01 18:55:50,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@509f2cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:50, skipping insertion in model container [2023-04-01 18:55:50,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:55:50" (1/1) ... [2023-04-01 18:55:50,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:55:50,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:55:50,641 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/nr5.c[394,407] [2023-04-01 18:55:50,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:55:50,664 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:55:50,672 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/nr5.c[394,407] [2023-04-01 18:55:50,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:55:50,685 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:55:50,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:50 WrapperNode [2023-04-01 18:55:50,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:55:50,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:55:50,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:55:50,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:55:50,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:50" (1/1) ... [2023-04-01 18:55:50,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:50" (1/1) ... [2023-04-01 18:55:50,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:50" (1/1) ... [2023-04-01 18:55:50,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:50" (1/1) ... [2023-04-01 18:55:50,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:50" (1/1) ... [2023-04-01 18:55:50,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:50" (1/1) ... [2023-04-01 18:55:50,704 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:50" (1/1) ... [2023-04-01 18:55:50,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:50" (1/1) ... [2023-04-01 18:55:50,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:55:50,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:55:50,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:55:50,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:55:50,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:50" (1/1) ... [2023-04-01 18:55:50,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:55:50,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:50,727 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) [2023-04-01 18:55:50,735 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 [2023-04-01 18:55:50,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:55:50,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:55:50,752 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:55:50,753 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 18:55:50,753 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:55:50,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:55:50,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:55:50,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:55:50,753 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:55:50,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:55:50,753 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 18:55:50,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:55:50,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:55:50,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:55:50,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:55:50,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:55:50,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:55:50,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:55:50,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:55:50,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:55:50,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:55:50,797 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:55:50,798 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:55:50,922 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:55:50,926 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:55:50,926 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 18:55:50,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:55:50 BoogieIcfgContainer [2023-04-01 18:55:50,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:55:50,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:55:50,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:55:50,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:55:50,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:55:50" (1/3) ... [2023-04-01 18:55:50,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b8c490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:55:50, skipping insertion in model container [2023-04-01 18:55:50,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:50" (2/3) ... [2023-04-01 18:55:50,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b8c490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:55:50, skipping insertion in model container [2023-04-01 18:55:50,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:55:50" (3/3) ... [2023-04-01 18:55:50,932 INFO L112 eAbstractionObserver]: Analyzing ICFG nr5.c [2023-04-01 18:55:50,945 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:55:50,946 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:55:50,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:55:50,978 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=LoopsAndPotentialCycles, 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;@5bef2fda, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:55:50,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:55:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:50,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:55:50,990 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:50,990 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] [2023-04-01 18:55:50,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:51,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:51,000 INFO L85 PathProgramCache]: Analyzing trace with hash 208371713, now seen corresponding path program 1 times [2023-04-01 18:55:51,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:51,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962604769] [2023-04-01 18:55:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:51,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:51,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:51,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:51,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:51,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962604769] [2023-04-01 18:55:51,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962604769] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:55:51,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:55:51,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:55:51,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628375838] [2023-04-01 18:55:51,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:55:51,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:55:51,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:51,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:55:51,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:55:51,230 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:51,316 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2023-04-01 18:55:51,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:55:51,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 18:55:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:51,323 INFO L225 Difference]: With dead ends: 63 [2023-04-01 18:55:51,324 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 18:55:51,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:55:51,330 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:51,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:55:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 18:55:51,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 18:55:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:55:51,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-04-01 18:55:51,361 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2023-04-01 18:55:51,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:51,361 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-04-01 18:55:51,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-04-01 18:55:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:55:51,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:51,364 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] [2023-04-01 18:55:51,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:55:51,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:51,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash -963394890, now seen corresponding path program 1 times [2023-04-01 18:55:51,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:51,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499972406] [2023-04-01 18:55:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:51,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:51,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:51,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:51,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:51,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499972406] [2023-04-01 18:55:51,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499972406] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:55:51,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:55:51,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 18:55:51,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539476165] [2023-04-01 18:55:51,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:55:51,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:55:51,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:51,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:55:51,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:55:51,527 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:51,627 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-04-01 18:55:51,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:55:51,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 18:55:51,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:51,629 INFO L225 Difference]: With dead ends: 39 [2023-04-01 18:55:51,629 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 18:55:51,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 18:55:51,634 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:51,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:55:51,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 18:55:51,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-04-01 18:55:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-04-01 18:55:51,639 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2023-04-01 18:55:51,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:51,639 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-04-01 18:55:51,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:51,640 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-04-01 18:55:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:55:51,640 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:51,640 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] [2023-04-01 18:55:51,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:55:51,641 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:51,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:51,641 INFO L85 PathProgramCache]: Analyzing trace with hash -961547848, now seen corresponding path program 1 times [2023-04-01 18:55:51,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:51,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046616319] [2023-04-01 18:55:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:51,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:51,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:51,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:51,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:51,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046616319] [2023-04-01 18:55:51,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046616319] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:55:51,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:55:51,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 18:55:51,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600507334] [2023-04-01 18:55:51,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:55:51,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:55:51,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:51,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:55:51,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:55:51,786 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:55:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:51,846 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2023-04-01 18:55:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:55:51,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-04-01 18:55:51,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:51,848 INFO L225 Difference]: With dead ends: 58 [2023-04-01 18:55:51,848 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 18:55:51,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:55:51,849 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:51,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 32 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:55:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 18:55:51,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2023-04-01 18:55:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-04-01 18:55:51,856 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 22 [2023-04-01 18:55:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:51,856 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-04-01 18:55:51,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:55:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-04-01 18:55:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 18:55:51,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:51,857 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] [2023-04-01 18:55:51,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 18:55:51,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:51,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:51,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1506939926, now seen corresponding path program 1 times [2023-04-01 18:55:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:51,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109567680] [2023-04-01 18:55:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:51,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:51,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:51,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:51,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:51,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109567680] [2023-04-01 18:55:51,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109567680] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:55:51,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:55:51,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:55:51,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191613972] [2023-04-01 18:55:51,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:55:51,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:55:51,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:51,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:55:51,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:55:51,917 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:51,957 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2023-04-01 18:55:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:55:51,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-04-01 18:55:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:51,958 INFO L225 Difference]: With dead ends: 62 [2023-04-01 18:55:51,958 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 18:55:51,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:55:51,959 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:51,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:55:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 18:55:51,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-04-01 18:55:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-04-01 18:55:51,966 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 25 [2023-04-01 18:55:51,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:51,966 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-04-01 18:55:51,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-04-01 18:55:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 18:55:51,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:51,967 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, 1, 1, 1] [2023-04-01 18:55:51,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 18:55:51,967 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:51,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1007761327, now seen corresponding path program 1 times [2023-04-01 18:55:51,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:51,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83663461] [2023-04-01 18:55:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:51,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:52,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:52,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:52,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:52,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83663461] [2023-04-01 18:55:52,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83663461] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:55:52,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349446552] [2023-04-01 18:55:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:52,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:52,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:52,049 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) [2023-04-01 18:55:52,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:55:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:52,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:55:52,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:55:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:52,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:55:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:52,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349446552] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:55:52,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:55:52,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:55:52,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281803790] [2023-04-01 18:55:52,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:55:52,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:55:52,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:52,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:55:52,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:55:52,179 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:52,246 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2023-04-01 18:55:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:55:52,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-04-01 18:55:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:52,248 INFO L225 Difference]: With dead ends: 70 [2023-04-01 18:55:52,248 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 18:55:52,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:55:52,251 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:52,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 41 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:55:52,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 18:55:52,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 18:55:52,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 38 states have internal predecessors, (45), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2023-04-01 18:55:52,269 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 28 [2023-04-01 18:55:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:52,270 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2023-04-01 18:55:52,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:52,270 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2023-04-01 18:55:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 18:55:52,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:52,271 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-04-01 18:55:52,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 18:55:52,476 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 [2023-04-01 18:55:52,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:52,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:52,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1007640490, now seen corresponding path program 2 times [2023-04-01 18:55:52,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:52,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042566738] [2023-04-01 18:55:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:52,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:52,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:52,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:52,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:52,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042566738] [2023-04-01 18:55:52,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042566738] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:55:52,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739061505] [2023-04-01 18:55:52,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:55:52,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:52,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:52,609 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) [2023-04-01 18:55:52,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:55:52,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:55:52,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:55:52,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:55:52,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:55:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:52,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:55:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:52,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739061505] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:55:52,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:55:52,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 9 [2023-04-01 18:55:52,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045500443] [2023-04-01 18:55:52,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:55:52,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 18:55:52,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:52,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 18:55:52,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-04-01 18:55:52,756 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:52,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:52,839 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2023-04-01 18:55:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 18:55:52,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-04-01 18:55:52,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:52,841 INFO L225 Difference]: With dead ends: 82 [2023-04-01 18:55:52,841 INFO L226 Difference]: Without dead ends: 50 [2023-04-01 18:55:52,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-04-01 18:55:52,845 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:52,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 75 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:55:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-01 18:55:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-04-01 18:55:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-04-01 18:55:52,853 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 37 [2023-04-01 18:55:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:52,853 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-04-01 18:55:52,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:52,853 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-04-01 18:55:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 18:55:52,854 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:52,854 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2023-04-01 18:55:52,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:55:53,060 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 [2023-04-01 18:55:53,060 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:53,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:53,063 INFO L85 PathProgramCache]: Analyzing trace with hash -53357551, now seen corresponding path program 3 times [2023-04-01 18:55:53,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:53,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761227456] [2023-04-01 18:55:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:53,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:53,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:53,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:53,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:53,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761227456] [2023-04-01 18:55:53,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761227456] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:55:53,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986329405] [2023-04-01 18:55:53,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:55:53,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:53,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:53,197 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) [2023-04-01 18:55:53,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:55:53,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 18:55:53,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:55:53,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 18:55:53,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:55:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 18:55:53,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:55:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 18:55:53,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986329405] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:55:53,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:55:53,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-04-01 18:55:53,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533690063] [2023-04-01 18:55:53,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:55:53,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 18:55:53,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:53,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 18:55:53,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:55:53,325 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:55:53,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:53,453 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2023-04-01 18:55:53,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 18:55:53,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2023-04-01 18:55:53,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:53,454 INFO L225 Difference]: With dead ends: 90 [2023-04-01 18:55:53,454 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 18:55:53,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-04-01 18:55:53,455 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:53,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 91 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:55:53,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 18:55:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-04-01 18:55:53,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 44 states have internal predecessors, (49), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2023-04-01 18:55:53,461 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 40 [2023-04-01 18:55:53,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:53,461 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2023-04-01 18:55:53,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:55:53,461 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2023-04-01 18:55:53,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 18:55:53,462 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:53,462 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 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] [2023-04-01 18:55:53,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:55:53,667 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 [2023-04-01 18:55:53,667 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:53,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:53,668 INFO L85 PathProgramCache]: Analyzing trace with hash 204807887, now seen corresponding path program 1 times [2023-04-01 18:55:53,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:53,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026629287] [2023-04-01 18:55:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:53,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:54,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:54,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:54,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:54,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026629287] [2023-04-01 18:55:54,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026629287] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:55:54,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631724581] [2023-04-01 18:55:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:54,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:54,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:54,338 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) [2023-04-01 18:55:54,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:55:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:54,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-01 18:55:54,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:55:54,618 INFO L350 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 [2023-04-01 18:55:54,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:55:54,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 18:55:54,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:55:54,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 18:55:54,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:55:54,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 18:55:54,834 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 18:55:54,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2023-04-01 18:55:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:55,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:40,588 INFO L350 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 95 treesize of output 91 [2023-04-01 18:56:40,609 INFO L350 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 8739 treesize of output 8675 [2023-04-01 18:56:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 29 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:56:45,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631724581] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:45,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:45,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20] total 52 [2023-04-01 18:56:45,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356495505] [2023-04-01 18:56:45,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:45,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-04-01 18:56:45,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:45,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-04-01 18:56:45,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2319, Unknown=20, NotChecked=0, Total=2652 [2023-04-01 18:56:45,164 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 52 states, 50 states have (on average 1.84) internal successors, (92), 46 states have internal predecessors, (92), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:56:46,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:46,618 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2023-04-01 18:56:46,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 18:56:46,618 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.84) internal successors, (92), 46 states have internal predecessors, (92), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2023-04-01 18:56:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:46,619 INFO L225 Difference]: With dead ends: 127 [2023-04-01 18:56:46,619 INFO L226 Difference]: Without dead ends: 111 [2023-04-01 18:56:46,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 50.9s TimeCoverageRelationStatistics Valid=910, Invalid=5390, Unknown=20, NotChecked=0, Total=6320 [2023-04-01 18:56:46,623 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 231 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:46,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 196 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 18:56:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-01 18:56:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 79. [2023-04-01 18:56:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 70 states have internal predecessors, (80), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:56:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2023-04-01 18:56:46,643 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 40 [2023-04-01 18:56:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:46,645 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2023-04-01 18:56:46,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.84) internal successors, (92), 46 states have internal predecessors, (92), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:56:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2023-04-01 18:56:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 18:56:46,647 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:46,647 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 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, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:46,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 18:56:46,852 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 [2023-04-01 18:56:46,852 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:46,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:46,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1442536208, now seen corresponding path program 1 times [2023-04-01 18:56:46,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:46,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941384390] [2023-04-01 18:56:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:46,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:47,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:47,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:47,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-01 18:56:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:56:47,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:47,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941384390] [2023-04-01 18:56:47,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941384390] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:47,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061692051] [2023-04-01 18:56:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:47,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:47,503 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) [2023-04-01 18:56:47,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:56:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:47,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 18:56:47,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:47,675 INFO L350 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 [2023-04-01 18:56:47,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:56:47,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 18:56:47,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:56:47,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 18:56:47,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:56:47,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 18:56:47,950 INFO L350 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 [2023-04-01 18:56:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:56:47,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:56,181 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_main_~j~0_45 Int)) (or (< c_main_~j~0 (+ v_main_~j~0_45 1)) (forall ((v_ArrVal_126 Int) (v_ArrVal_123 Int) (v_main_~j~0_44 Int)) (or (< c_main_~MINVAL~0 (+ (select (let ((.cse0 (* c_main_~i~0 20))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* v_main_~j~0_45 (- 4)) |c_main_~#volArray~0.offset| .cse0) v_ArrVal_123) (+ (* v_main_~j~0_44 (- 4)) |c_main_~#volArray~0.offset| .cse0) v_ArrVal_126)) (+ |c_main_~#volArray~0.offset| 4)) 1)) (< v_main_~j~0_45 (+ v_main_~j~0_44 1)))))) is different from false [2023-04-01 18:57:20,630 INFO L350 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 51 treesize of output 49 [2023-04-01 18:57:20,634 INFO L350 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 726 treesize of output 718 [2023-04-01 18:57:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-04-01 18:57:22,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061692051] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:57:22,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:57:22,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 16] total 44 [2023-04-01 18:57:22,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097806611] [2023-04-01 18:57:22,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:57:22,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-04-01 18:57:22,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:57:22,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-04-01 18:57:22,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1521, Unknown=17, NotChecked=82, Total=1892 [2023-04-01 18:57:22,865 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 44 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 42 states have internal predecessors, (104), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 18:57:25,347 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 [1] [2023-04-01 18:57:28,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:30,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:32,428 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] [2023-04-01 18:57:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:57:32,803 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2023-04-01 18:57:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 18:57:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 42 states have internal predecessors, (104), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 49 [2023-04-01 18:57:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:57:32,805 INFO L225 Difference]: With dead ends: 155 [2023-04-01 18:57:32,805 INFO L226 Difference]: Without dead ends: 139 [2023-04-01 18:57:32,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=671, Invalid=4286, Unknown=17, NotChecked=138, Total=5112 [2023-04-01 18:57:32,807 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 203 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 75 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:57:32,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 191 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 943 Invalid, 4 Unknown, 115 Unchecked, 9.2s Time] [2023-04-01 18:57:32,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-04-01 18:57:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 113. [2023-04-01 18:57:32,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 97 states have internal predecessors, (107), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:57:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 128 transitions. [2023-04-01 18:57:32,826 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 128 transitions. Word has length 49 [2023-04-01 18:57:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:57:32,827 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 128 transitions. [2023-04-01 18:57:32,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 42 states have internal predecessors, (104), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 18:57:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 128 transitions. [2023-04-01 18:57:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 18:57:32,832 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:57:32,832 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:57:32,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 18:57:33,036 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 [2023-04-01 18:57:33,036 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:57:33,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:57:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash -400664593, now seen corresponding path program 2 times [2023-04-01 18:57:33,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:57:33,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986800609] [2023-04-01 18:57:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:57:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:57:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:33,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:57:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:33,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:57:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:33,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-01 18:57:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:33,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:57:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:57:33,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:57:33,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986800609] [2023-04-01 18:57:33,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986800609] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:57:33,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885977424] [2023-04-01 18:57:33,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:57:33,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:33,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:57:33,591 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) [2023-04-01 18:57:33,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:57:33,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:57:33,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:57:33,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-01 18:57:33,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:57:33,784 INFO L350 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 [2023-04-01 18:57:33,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:57:33,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 18:57:33,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:57:33,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 18:57:34,179 INFO L350 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 [2023-04-01 18:57:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:57:34,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:57:44,453 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_156 Int) (v_ArrVal_153 Int) (v_main_~j~0_55 Int)) (or (< c_main_~MINVAL~0 (+ (select (let ((.cse0 (* c_main_~i~0 20))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* (- 4) c_main_~j~0) |c_main_~#volArray~0.offset| .cse0) v_ArrVal_153) (+ (* v_main_~j~0_55 (- 4)) |c_main_~#volArray~0.offset| .cse0) v_ArrVal_156)) (+ 8 |c_main_~#volArray~0.offset|)) 1)) (< c_main_~j~0 (+ v_main_~j~0_55 1)))) is different from false [2023-04-01 18:57:56,586 INFO L350 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 41 treesize of output 39 [2023-04-01 18:57:56,590 INFO L350 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 170 treesize of output 166 [2023-04-01 18:57:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2023-04-01 18:57:56,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885977424] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:57:56,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:57:56,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 16] total 48 [2023-04-01 18:57:56,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060399442] [2023-04-01 18:57:56,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:57:56,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-04-01 18:57:56,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:57:56,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-04-01 18:57:56,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1907, Unknown=11, NotChecked=90, Total=2256 [2023-04-01 18:57:56,791 INFO L87 Difference]: Start difference. First operand 113 states and 128 transitions. Second operand has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 46 states have internal predecessors, (116), 12 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:57:58,957 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] [2023-04-01 18:58:36,332 WARN L223 SmtUtils]: Spent 15.07s on a formula simplification. DAG size of input: 53 DAG size of output: 47 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 18:58:43,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 18:58:47,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:49,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:51,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:54,023 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] [2023-04-01 18:58:54,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:54,521 INFO L93 Difference]: Finished difference Result 346 states and 402 transitions. [2023-04-01 18:58:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-04-01 18:58:54,521 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 46 states have internal predecessors, (116), 12 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 58 [2023-04-01 18:58:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:54,522 INFO L225 Difference]: With dead ends: 346 [2023-04-01 18:58:54,522 INFO L226 Difference]: Without dead ends: 259 [2023-04-01 18:58:54,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 98 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 67.2s TimeCoverageRelationStatistics Valid=957, Invalid=6859, Unknown=20, NotChecked=174, Total=8010 [2023-04-01 18:58:54,524 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 384 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 172 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:54,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 330 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1292 Invalid, 7 Unknown, 160 Unchecked, 13.3s Time] [2023-04-01 18:58:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-04-01 18:58:54,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 183. [2023-04-01 18:58:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 149 states have (on average 1.1476510067114094) internal successors, (171), 157 states have internal predecessors, (171), 20 states have call successors, (20), 14 states have call predecessors, (20), 13 states have return successors, (19), 11 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-01 18:58:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 210 transitions. [2023-04-01 18:58:54,549 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 210 transitions. Word has length 58 [2023-04-01 18:58:54,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:54,549 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 210 transitions. [2023-04-01 18:58:54,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 46 states have internal predecessors, (116), 12 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:58:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 210 transitions. [2023-04-01 18:58:54,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 18:58:54,550 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:54,550 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2023-04-01 18:58:54,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 18:58:54,753 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 [2023-04-01 18:58:54,754 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:54,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:54,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1282382352, now seen corresponding path program 3 times [2023-04-01 18:58:54,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:54,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998588098] [2023-04-01 18:58:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:54,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-01 18:58:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:58:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-04-01 18:58:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:58:55,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:55,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998588098] [2023-04-01 18:58:55,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998588098] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:55,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205199362] [2023-04-01 18:58:55,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:58:55,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:55,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:55,234 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) [2023-04-01 18:58:55,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 18:58:55,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 18:58:55,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:58:55,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 18:58:55,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:55,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-04-01 18:58:55,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2023-04-01 18:59:22,122 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 18:59:22,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2023-04-01 18:59:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 18:59:22,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:24,447 INFO L350 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 32 treesize of output 30 [2023-04-01 18:59:24,450 INFO L350 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 78 treesize of output 74 [2023-04-01 18:59:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 18:59:24,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205199362] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:24,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:24,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 41 [2023-04-01 18:59:24,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681040347] [2023-04-01 18:59:24,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:24,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-01 18:59:24,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:24,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-01 18:59:24,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1410, Unknown=5, NotChecked=0, Total=1640 [2023-04-01 18:59:24,507 INFO L87 Difference]: Start difference. First operand 183 states and 210 transitions. Second operand has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 40 states have internal predecessors, (105), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 18:59:25,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:28,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:59:30,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:33,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:35,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:37,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:39,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:41,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:44,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:46,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:48,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:50,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:53,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:55,051 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] [2023-04-01 18:59:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:55,765 INFO L93 Difference]: Finished difference Result 300 states and 351 transitions. [2023-04-01 18:59:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 18:59:55,766 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 40 states have internal predecessors, (105), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 67 [2023-04-01 18:59:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:55,767 INFO L225 Difference]: With dead ends: 300 [2023-04-01 18:59:55,767 INFO L226 Difference]: Without dead ends: 256 [2023-04-01 18:59:55,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=1203, Invalid=5932, Unknown=5, NotChecked=0, Total=7140 [2023-04-01 18:59:55,769 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 367 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 207 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:55,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 308 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1458 Invalid, 14 Unknown, 0 Unchecked, 28.2s Time] [2023-04-01 18:59:55,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-04-01 18:59:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 198. [2023-04-01 18:59:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 161 states have (on average 1.1366459627329193) internal successors, (183), 169 states have internal predecessors, (183), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 14 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-01 18:59:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 228 transitions. [2023-04-01 18:59:55,804 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 228 transitions. Word has length 67 [2023-04-01 18:59:55,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:55,805 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 228 transitions. [2023-04-01 18:59:55,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 40 states have internal predecessors, (105), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 18:59:55,806 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 228 transitions. [2023-04-01 18:59:55,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 18:59:55,807 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:55,807 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:55,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 18:59:56,012 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 [2023-04-01 18:59:56,012 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:56,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:56,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1596487409, now seen corresponding path program 4 times [2023-04-01 18:59:56,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:56,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874500683] [2023-04-01 18:59:56,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:56,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-01 18:59:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:59:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-04-01 18:59:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-04-01 18:59:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 60 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:59:56,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874500683] [2023-04-01 18:59:56,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874500683] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279570721] [2023-04-01 18:59:56,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:59:56,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:56,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:56,414 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) [2023-04-01 18:59:56,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 18:59:56,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:59:56,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:59:56,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-01 18:59:56,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:56,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-04-01 19:00:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:00:28,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:00:31,077 INFO L350 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 [2023-04-01 19:00:31,079 INFO L350 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 [2023-04-01 19:00:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 25 proven. 70 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:00:31,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279570721] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:00:31,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:00:31,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 21] total 41 [2023-04-01 19:00:31,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460482946] [2023-04-01 19:00:31,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:00:31,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-01 19:00:31,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:00:31,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-01 19:00:31,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1449, Unknown=5, NotChecked=0, Total=1640 [2023-04-01 19:00:31,307 INFO L87 Difference]: Start difference. First operand 198 states and 228 transitions. Second operand has 41 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 38 states have internal predecessors, (109), 11 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11)