/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/pr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:16:57,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:16:57,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:16:57,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 22:16:57,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 22:16:57,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 22:16:57,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 22:16:57,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 22:16:57,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 22:16:57,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 22:16:57,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 22:16:57,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 22:16:57,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:16:57,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:16:57,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:16:57,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:16:57,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:16:57,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:16:57,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:16:57,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:16:57,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:16:57,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:16:57,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:16:57,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:16:57,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:16:57,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:16:57,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:16:57,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:16:57,432 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 [2023-03-30 22:16:57,461 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:16:57,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:16:57,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:16:57,462 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:16:57,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:16:57,463 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:16:57,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:16:57,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:16:57,464 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:16:57,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:16:57,465 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:16:57,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:16:57,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:16:57,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:16:57,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:16:57,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:16:57,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:16:57,466 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:16:57,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:16:57,466 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:16:57,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:16:57,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:16:57,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:16:57,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:16:57,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:16:57,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:16:57,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:16:57,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:16:57,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:16:57,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:16:57,468 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:16:57,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:16:57,469 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:16:57,469 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:16:57,469 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:16:57,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:16:57,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:16:57,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:16:57,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:16:57,668 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:16:57,668 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:16:57,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr2.c [2023-03-30 22:16:58,721 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:16:58,881 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:16:58,881 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr2.c [2023-03-30 22:16:58,886 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e2fe0957/877f9c0290ff432faf84c73ef2f9e991/FLAGaa0349446 [2023-03-30 22:16:58,902 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e2fe0957/877f9c0290ff432faf84c73ef2f9e991 [2023-03-30 22:16:58,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:16:58,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:16:58,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:16:58,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:16:58,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:16:58,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:16:58" (1/1) ... [2023-03-30 22:16:58,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62969066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:16:58, skipping insertion in model container [2023-03-30 22:16:58,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:16:58" (1/1) ... [2023-03-30 22:16:58,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:16:58,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:16:59,041 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/pr2.c[394,407] [2023-03-30 22:16:59,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:16:59,073 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:16:59,082 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/pr2.c[394,407] [2023-03-30 22:16:59,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:16:59,099 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:16:59,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:16:59 WrapperNode [2023-03-30 22:16:59,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:16:59,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:16:59,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:16:59,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:16:59,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:16:59" (1/1) ... [2023-03-30 22:16:59,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:16:59" (1/1) ... [2023-03-30 22:16:59,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:16:59" (1/1) ... [2023-03-30 22:16:59,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:16:59" (1/1) ... [2023-03-30 22:16:59,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:16:59" (1/1) ... [2023-03-30 22:16:59,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:16:59" (1/1) ... [2023-03-30 22:16:59,121 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:16:59" (1/1) ... [2023-03-30 22:16:59,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:16:59" (1/1) ... [2023-03-30 22:16:59,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:16:59,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:16:59,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:16:59,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:16:59,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:16:59" (1/1) ... [2023-03-30 22:16:59,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:16:59,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:16:59,150 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) [2023-03-30 22:16:59,161 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 [2023-03-30 22:16:59,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:16:59,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:16:59,191 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:16:59,191 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-30 22:16:59,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:16:59,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:16:59,191 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:16:59,191 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:16:59,192 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:16:59,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:16:59,192 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-30 22:16:59,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:16:59,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:16:59,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:16:59,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:16:59,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:16:59,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:16:59,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:16:59,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:16:59,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:16:59,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:16:59,245 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:16:59,247 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:16:59,436 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:16:59,440 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:16:59,440 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-30 22:16:59,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:16:59 BoogieIcfgContainer [2023-03-30 22:16:59,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:16:59,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:16:59,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:16:59,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:16:59,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:16:58" (1/3) ... [2023-03-30 22:16:59,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e005000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:16:59, skipping insertion in model container [2023-03-30 22:16:59,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:16:59" (2/3) ... [2023-03-30 22:16:59,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e005000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:16:59, skipping insertion in model container [2023-03-30 22:16:59,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:16:59" (3/3) ... [2023-03-30 22:16:59,447 INFO L112 eAbstractionObserver]: Analyzing ICFG pr2.c [2023-03-30 22:16:59,459 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:16:59,459 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:16:59,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:16:59,495 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;@3e2d3a5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:16:59,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:16:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 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) [2023-03-30 22:16:59,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:16:59,503 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:16:59,503 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] [2023-03-30 22:16:59,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:16:59,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:16:59,508 INFO L85 PathProgramCache]: Analyzing trace with hash 475956100, now seen corresponding path program 1 times [2023-03-30 22:16:59,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:16:59,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889183229] [2023-03-30 22:16:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:16:59,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:16:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:16:59,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:16:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:16:59,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:16:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:16:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:16:59,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:16:59,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889183229] [2023-03-30 22:16:59,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889183229] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:16:59,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:16:59,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:16:59,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641134302] [2023-03-30 22:16:59,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:16:59,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:16:59,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:16:59,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:16:59,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:16:59,688 INFO L87 Difference]: Start difference. First operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 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) [2023-03-30 22:16:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:16:59,763 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2023-03-30 22:16:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:16:59,765 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 [2023-03-30 22:16:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:16:59,769 INFO L225 Difference]: With dead ends: 61 [2023-03-30 22:16:59,769 INFO L226 Difference]: Without dead ends: 30 [2023-03-30 22:16:59,771 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 [2023-03-30 22:16:59,775 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:16:59,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 37 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:16:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-03-30 22:16:59,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-03-30 22:16:59,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2023-03-30 22:16:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-03-30 22:16:59,811 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2023-03-30 22:16:59,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:16:59,812 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-03-30 22:16:59,813 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) [2023-03-30 22:16:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-03-30 22:16:59,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:16:59,814 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:16:59,815 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] [2023-03-30 22:16:59,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:16:59,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:16:59,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:16:59,816 INFO L85 PathProgramCache]: Analyzing trace with hash 734121538, now seen corresponding path program 1 times [2023-03-30 22:16:59,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:16:59,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695599512] [2023-03-30 22:16:59,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:16:59,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:16:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:16:59,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:16:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:16:59,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:16:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:16:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:16:59,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:16:59,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695599512] [2023-03-30 22:16:59,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695599512] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:16:59,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:16:59,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:16:59,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841877065] [2023-03-30 22:16:59,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:16:59,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:16:59,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:16:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:16:59,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:16:59,973 INFO L87 Difference]: Start difference. First operand 30 states and 34 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) [2023-03-30 22:17:00,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:00,059 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-03-30 22:17:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:17:00,059 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 [2023-03-30 22:17:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:00,060 INFO L225 Difference]: With dead ends: 38 [2023-03-30 22:17:00,060 INFO L226 Difference]: Without dead ends: 36 [2023-03-30 22:17:00,060 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 [2023-03-30 22:17:00,061 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:00,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 88 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:17:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-03-30 22:17:00,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-03-30 22:17:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 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) [2023-03-30 22:17:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-03-30 22:17:00,068 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 22 [2023-03-30 22:17:00,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:00,068 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-03-30 22:17:00,068 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) [2023-03-30 22:17:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-03-30 22:17:00,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:17:00,069 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:00,069 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] [2023-03-30 22:17:00,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:17:00,069 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:00,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash 735968580, now seen corresponding path program 1 times [2023-03-30 22:17:00,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:00,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647304369] [2023-03-30 22:17:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:00,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:00,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:00,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:00,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:00,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647304369] [2023-03-30 22:17:00,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647304369] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:00,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:00,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:17:00,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436549559] [2023-03-30 22:17:00,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:00,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:17:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:00,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:17:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:17:00,223 INFO L87 Difference]: Start difference. First operand 35 states and 39 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) [2023-03-30 22:17:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:00,292 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2023-03-30 22:17:00,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:17:00,293 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 [2023-03-30 22:17:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:00,295 INFO L225 Difference]: With dead ends: 56 [2023-03-30 22:17:00,295 INFO L226 Difference]: Without dead ends: 39 [2023-03-30 22:17:00,295 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 [2023-03-30 22:17:00,296 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:00,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:17:00,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-03-30 22:17:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2023-03-30 22:17:00,303 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) [2023-03-30 22:17:00,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-03-30 22:17:00,304 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2023-03-30 22:17:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:00,304 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-03-30 22:17:00,305 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) [2023-03-30 22:17:00,305 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-03-30 22:17:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-30 22:17:00,305 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:00,305 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] [2023-03-30 22:17:00,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 22:17:00,306 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:00,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:00,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2064008045, now seen corresponding path program 1 times [2023-03-30 22:17:00,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:00,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421797304] [2023-03-30 22:17:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:00,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:00,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:00,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:00,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:00,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421797304] [2023-03-30 22:17:00,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421797304] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:00,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:00,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-30 22:17:00,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504945389] [2023-03-30 22:17:00,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:00,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:17:00,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:00,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:17:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:17:00,393 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-03-30 22:17:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:00,467 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2023-03-30 22:17:00,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:17:00,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 26 [2023-03-30 22:17:00,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:00,471 INFO L225 Difference]: With dead ends: 68 [2023-03-30 22:17:00,471 INFO L226 Difference]: Without dead ends: 47 [2023-03-30 22:17:00,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:17:00,478 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:00,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 47 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:00,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-03-30 22:17:00,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2023-03-30 22:17:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 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) [2023-03-30 22:17:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2023-03-30 22:17:00,497 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 26 [2023-03-30 22:17:00,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:00,498 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2023-03-30 22:17:00,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-03-30 22:17:00,498 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2023-03-30 22:17:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-30 22:17:00,500 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:00,500 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] [2023-03-30 22:17:00,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 22:17:00,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:00,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:00,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1670981035, now seen corresponding path program 1 times [2023-03-30 22:17:00,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:00,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649771403] [2023-03-30 22:17:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:00,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:00,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:00,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:00,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:00,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649771403] [2023-03-30 22:17:00,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649771403] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:00,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141647799] [2023-03-30 22:17:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:00,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:00,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:00,831 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) [2023-03-30 22:17:00,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:17:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:00,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-30 22:17:00,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:00,971 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 [2023-03-30 22:17:00,994 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 19 treesize of output 18 [2023-03-30 22:17:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:01,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:01,105 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 13 [2023-03-30 22:17:01,108 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 14 treesize of output 12 [2023-03-30 22:17:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:01,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141647799] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:01,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:01,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 16 [2023-03-30 22:17:01,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641643580] [2023-03-30 22:17:01,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-30 22:17:01,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-30 22:17:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-03-30 22:17:01,135 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:17:01,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:01,378 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-03-30 22:17:01,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-30 22:17:01,379 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-03-30 22:17:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:01,381 INFO L225 Difference]: With dead ends: 78 [2023-03-30 22:17:01,381 INFO L226 Difference]: Without dead ends: 76 [2023-03-30 22:17:01,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-03-30 22:17:01,383 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:01,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 128 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:01,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-03-30 22:17:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 48. [2023-03-30 22:17:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 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) [2023-03-30 22:17:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-03-30 22:17:01,396 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 26 [2023-03-30 22:17:01,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:01,396 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-03-30 22:17:01,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:17:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-03-30 22:17:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-30 22:17:01,397 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:01,397 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] [2023-03-30 22:17:01,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 22:17:01,620 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 [2023-03-30 22:17:01,621 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:01,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:01,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1362943467, now seen corresponding path program 1 times [2023-03-30 22:17:01,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:01,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903451792] [2023-03-30 22:17:01,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:01,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:01,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:01,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:01,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:01,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903451792] [2023-03-30 22:17:01,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903451792] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:01,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377488183] [2023-03-30 22:17:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:01,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:01,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:01,835 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) [2023-03-30 22:17:01,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:17:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:01,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-30 22:17:01,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:01,907 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 [2023-03-30 22:17:01,928 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 19 treesize of output 18 [2023-03-30 22:17:01,972 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 [2023-03-30 22:17:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:01,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:02,033 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 17 treesize of output 15 [2023-03-30 22:17:02,035 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 16 treesize of output 14 [2023-03-30 22:17:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:02,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377488183] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:02,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:02,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 19 [2023-03-30 22:17:02,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740703694] [2023-03-30 22:17:02,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:02,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-03-30 22:17:02,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:02,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-03-30 22:17:02,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-03-30 22:17:02,052 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:17:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:02,469 INFO L93 Difference]: Finished difference Result 124 states and 158 transitions. [2023-03-30 22:17:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-30 22:17:02,470 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-03-30 22:17:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:02,472 INFO L225 Difference]: With dead ends: 124 [2023-03-30 22:17:02,472 INFO L226 Difference]: Without dead ends: 99 [2023-03-30 22:17:02,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2023-03-30 22:17:02,473 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:02,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 141 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:17:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-03-30 22:17:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 56. [2023-03-30 22:17:02,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 47 states have internal predecessors, (57), 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) [2023-03-30 22:17:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-03-30 22:17:02,489 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 26 [2023-03-30 22:17:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:02,489 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-03-30 22:17:02,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:17:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-03-30 22:17:02,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-30 22:17:02,493 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:02,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:02,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-30 22:17:02,698 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 [2023-03-30 22:17:02,698 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:02,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:02,698 INFO L85 PathProgramCache]: Analyzing trace with hash -881529328, now seen corresponding path program 1 times [2023-03-30 22:17:02,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:02,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979741630] [2023-03-30 22:17:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:02,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:02,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:02,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:02,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:02,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979741630] [2023-03-30 22:17:02,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979741630] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:02,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:02,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:17:02,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205836438] [2023-03-30 22:17:02,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:02,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:17:02,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:02,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:17:02,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:17:02,731 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2023-03-30 22:17:02,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:02,772 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2023-03-30 22:17:02,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:17:02,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 30 [2023-03-30 22:17:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:02,773 INFO L225 Difference]: With dead ends: 78 [2023-03-30 22:17:02,773 INFO L226 Difference]: Without dead ends: 57 [2023-03-30 22:17:02,773 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 [2023-03-30 22:17:02,774 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:02,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:17:02,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-03-30 22:17:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-03-30 22:17:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 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) [2023-03-30 22:17:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2023-03-30 22:17:02,780 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 30 [2023-03-30 22:17:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:02,780 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2023-03-30 22:17:02,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2023-03-30 22:17:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2023-03-30 22:17:02,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-30 22:17:02,781 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:02,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:02,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-30 22:17:02,781 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:02,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2046832978, now seen corresponding path program 1 times [2023-03-30 22:17:02,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:02,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040050431] [2023-03-30 22:17:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:02,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:02,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:02,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:02,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:17:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:02,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:02,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040050431] [2023-03-30 22:17:02,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040050431] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:02,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083270618] [2023-03-30 22:17:02,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:02,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:02,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:02,967 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) [2023-03-30 22:17:02,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:17:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:03,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2023-03-30 22:17:03,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:03,028 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 [2023-03-30 22:17:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:03,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:03,156 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 17 treesize of output 15 [2023-03-30 22:17:03,157 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 16 treesize of output 12 [2023-03-30 22:17:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:03,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083270618] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:03,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:03,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2023-03-30 22:17:03,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492804059] [2023-03-30 22:17:03,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:03,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-30 22:17:03,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:03,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-30 22:17:03,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-03-30 22:17:03,184 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-30 22:17:03,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:03,450 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2023-03-30 22:17:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-30 22:17:03,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2023-03-30 22:17:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:03,451 INFO L225 Difference]: With dead ends: 101 [2023-03-30 22:17:03,451 INFO L226 Difference]: Without dead ends: 99 [2023-03-30 22:17:03,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2023-03-30 22:17:03,452 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 92 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:03,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 123 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:03,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-03-30 22:17:03,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2023-03-30 22:17:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 72 states have internal predecessors, (82), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-30 22:17:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2023-03-30 22:17:03,462 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 35 [2023-03-30 22:17:03,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:03,462 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2023-03-30 22:17:03,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-30 22:17:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2023-03-30 22:17:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-30 22:17:03,463 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:03,464 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:03,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:17:03,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:03,671 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:03,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:03,671 INFO L85 PathProgramCache]: Analyzing trace with hash 459759214, now seen corresponding path program 1 times [2023-03-30 22:17:03,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:03,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30253131] [2023-03-30 22:17:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:03,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:03,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:03,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:03,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:17:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:03,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:03,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30253131] [2023-03-30 22:17:03,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30253131] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:03,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109920028] [2023-03-30 22:17:03,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:03,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:03,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:03,897 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) [2023-03-30 22:17:03,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:17:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:03,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-30 22:17:03,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:04,001 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 [2023-03-30 22:17:04,061 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 [2023-03-30 22:17:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:04,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:04,114 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 [2023-03-30 22:17:04,116 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 18 treesize of output 14 [2023-03-30 22:17:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:17:04,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109920028] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:04,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:04,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2023-03-30 22:17:04,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431722428] [2023-03-30 22:17:04,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:04,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-03-30 22:17:04,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:04,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-03-30 22:17:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-03-30 22:17:04,132 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-03-30 22:17:04,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:04,349 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2023-03-30 22:17:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-30 22:17:04,349 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 35 [2023-03-30 22:17:04,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:04,350 INFO L225 Difference]: With dead ends: 128 [2023-03-30 22:17:04,350 INFO L226 Difference]: Without dead ends: 112 [2023-03-30 22:17:04,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2023-03-30 22:17:04,352 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:04,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 110 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:04,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-03-30 22:17:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2023-03-30 22:17:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 77 states have internal predecessors, (87), 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) [2023-03-30 22:17:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2023-03-30 22:17:04,370 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 35 [2023-03-30 22:17:04,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:04,370 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2023-03-30 22:17:04,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-03-30 22:17:04,370 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2023-03-30 22:17:04,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-30 22:17:04,372 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:04,372 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-03-30 22:17:04,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:17:04,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:04,577 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:04,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:04,577 INFO L85 PathProgramCache]: Analyzing trace with hash 457586601, now seen corresponding path program 1 times [2023-03-30 22:17:04,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:04,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606471876] [2023-03-30 22:17:04,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:04,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:04,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:04,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:04,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-03-30 22:17:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 22:17:04,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:04,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606471876] [2023-03-30 22:17:04,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606471876] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:17:04,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:17:04,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:17:04,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145795113] [2023-03-30 22:17:04,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:17:04,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:17:04,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:17:04,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:17:04,617 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:17:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:04,671 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2023-03-30 22:17:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:17:04,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-03-30 22:17:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:04,674 INFO L225 Difference]: With dead ends: 112 [2023-03-30 22:17:04,674 INFO L226 Difference]: Without dead ends: 89 [2023-03-30 22:17:04,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:17:04,675 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:04,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 44 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:17:04,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-03-30 22:17:04,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2023-03-30 22:17:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.161764705882353) internal successors, (79), 72 states have internal predecessors, (79), 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) [2023-03-30 22:17:04,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2023-03-30 22:17:04,688 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 39 [2023-03-30 22:17:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:04,689 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2023-03-30 22:17:04,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:17:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2023-03-30 22:17:04,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-03-30 22:17:04,691 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:04,691 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 22:17:04,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-30 22:17:04,691 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:04,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:04,691 INFO L85 PathProgramCache]: Analyzing trace with hash 249796875, now seen corresponding path program 2 times [2023-03-30 22:17:04,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:04,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403274606] [2023-03-30 22:17:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:04,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:04,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:04,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:04,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:17:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:04,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-03-30 22:17:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:17:04,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:04,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403274606] [2023-03-30 22:17:04,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403274606] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:04,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306400520] [2023-03-30 22:17:04,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:17:04,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:04,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:05,011 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) [2023-03-30 22:17:05,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:17:05,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:17:05,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:17:05,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 22:17:05,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:17:05,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:17:05,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306400520] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:05,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:05,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2023-03-30 22:17:05,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829601028] [2023-03-30 22:17:05,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:05,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-30 22:17:05,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:05,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-30 22:17:05,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2023-03-30 22:17:05,404 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-30 22:17:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:05,664 INFO L93 Difference]: Finished difference Result 185 states and 209 transitions. [2023-03-30 22:17:05,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-30 22:17:05,665 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 44 [2023-03-30 22:17:05,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:05,665 INFO L225 Difference]: With dead ends: 185 [2023-03-30 22:17:05,665 INFO L226 Difference]: Without dead ends: 110 [2023-03-30 22:17:05,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=787, Unknown=0, NotChecked=0, Total=1056 [2023-03-30 22:17:05,666 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 142 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:05,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 64 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:17:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-03-30 22:17:05,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 95. [2023-03-30 22:17:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 79 states have internal predecessors, (86), 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) [2023-03-30 22:17:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2023-03-30 22:17:05,677 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 44 [2023-03-30 22:17:05,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:05,677 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2023-03-30 22:17:05,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-30 22:17:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2023-03-30 22:17:05,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-03-30 22:17:05,677 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:05,677 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:05,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-30 22:17:05,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-30 22:17:05,883 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:05,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:05,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1840944590, now seen corresponding path program 3 times [2023-03-30 22:17:05,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:05,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633714697] [2023-03-30 22:17:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:05,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:06,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:06,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:06,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-03-30 22:17:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:06,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-03-30 22:17:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:17:06,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:06,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633714697] [2023-03-30 22:17:06,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633714697] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:06,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190399784] [2023-03-30 22:17:06,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:17:06,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:06,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:06,090 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) [2023-03-30 22:17:06,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:17:06,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-30 22:17:06,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:17:06,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-30 22:17:06,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:06,163 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 [2023-03-30 22:17:06,170 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 29 treesize of output 28 [2023-03-30 22:17:10,901 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-03-30 22:17:10,902 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 42 treesize of output 20 [2023-03-30 22:17:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:17:10,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:11,274 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 17 treesize of output 15 [2023-03-30 22:17:11,275 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 16 treesize of output 12 [2023-03-30 22:17:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:17:11,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190399784] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:11,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:11,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 18 [2023-03-30 22:17:11,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921440119] [2023-03-30 22:17:11,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:11,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-30 22:17:11,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:11,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-30 22:17:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=256, Unknown=3, NotChecked=0, Total=306 [2023-03-30 22:17:11,293 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-03-30 22:17:15,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:23,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:29,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:31,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:33,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:36,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:36,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:36,344 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2023-03-30 22:17:36,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-03-30 22:17:36,344 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2023-03-30 22:17:36,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:36,345 INFO L225 Difference]: With dead ends: 158 [2023-03-30 22:17:36,345 INFO L226 Difference]: Without dead ends: 156 [2023-03-30 22:17:36,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=174, Invalid=1078, Unknown=8, NotChecked=0, Total=1260 [2023-03-30 22:17:36,346 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 86 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 31 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:36,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 136 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 512 Invalid, 8 Unknown, 0 Unchecked, 12.8s Time] [2023-03-30 22:17:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-03-30 22:17:36,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 129. [2023-03-30 22:17:36,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 99 states have (on average 1.1515151515151516) internal successors, (114), 106 states have internal predecessors, (114), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (16), 9 states have call predecessors, (16), 16 states have call successors, (16) [2023-03-30 22:17:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2023-03-30 22:17:36,360 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 48 [2023-03-30 22:17:36,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:36,360 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2023-03-30 22:17:36,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-03-30 22:17:36,360 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2023-03-30 22:17:36,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-03-30 22:17:36,360 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:36,360 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:36,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 22:17:36,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:36,565 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:36,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:36,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1374919346, now seen corresponding path program 2 times [2023-03-30 22:17:36,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:36,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987680624] [2023-03-30 22:17:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:36,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:36,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:36,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:36,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-03-30 22:17:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:36,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-03-30 22:17:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:17:36,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987680624] [2023-03-30 22:17:36,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987680624] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:36,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663894254] [2023-03-30 22:17:36,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:17:36,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:36,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:36,894 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) [2023-03-30 22:17:36,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:17:36,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:17:36,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:17:36,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-30 22:17:36,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:37,067 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 [2023-03-30 22:17:37,095 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 19 treesize of output 18 [2023-03-30 22:17:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:17:37,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:37,474 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 [2023-03-30 22:17:37,477 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 [2023-03-30 22:17:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:17:37,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663894254] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:37,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:37,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 32 [2023-03-30 22:17:37,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370037790] [2023-03-30 22:17:37,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:37,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-03-30 22:17:37,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:37,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-03-30 22:17:37,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-03-30 22:17:37,617 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 31 states have internal predecessors, (84), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-30 22:17:39,757 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] [2023-03-30 22:17:41,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:43,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:17:44,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:44,934 INFO L93 Difference]: Finished difference Result 194 states and 221 transitions. [2023-03-30 22:17:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-03-30 22:17:44,934 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 31 states have internal predecessors, (84), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2023-03-30 22:17:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:44,935 INFO L225 Difference]: With dead ends: 194 [2023-03-30 22:17:44,935 INFO L226 Difference]: Without dead ends: 164 [2023-03-30 22:17:44,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=500, Invalid=2922, Unknown=0, NotChecked=0, Total=3422 [2023-03-30 22:17:44,936 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 171 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 76 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:44,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 270 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1041 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2023-03-30 22:17:44,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-03-30 22:17:44,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 139. [2023-03-30 22:17:44,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 114 states have internal predecessors, (122), 19 states have call successors, (19), 13 states have call predecessors, (19), 12 states have return successors, (18), 11 states have call predecessors, (18), 18 states have call successors, (18) [2023-03-30 22:17:44,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 159 transitions. [2023-03-30 22:17:44,954 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 159 transitions. Word has length 48 [2023-03-30 22:17:44,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:44,954 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 159 transitions. [2023-03-30 22:17:44,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 31 states have internal predecessors, (84), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-30 22:17:44,954 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 159 transitions. [2023-03-30 22:17:44,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-03-30 22:17:44,955 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:44,955 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:44,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 22:17:45,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:45,159 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:45,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:45,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1838854663, now seen corresponding path program 4 times [2023-03-30 22:17:45,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:45,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207038435] [2023-03-30 22:17:45,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:45,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:45,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:45,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:45,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-03-30 22:17:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:45,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-03-30 22:17:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:45,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-30 22:17:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:17:45,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:45,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207038435] [2023-03-30 22:17:45,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207038435] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:45,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71468410] [2023-03-30 22:17:45,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:17:45,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:45,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:45,480 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) [2023-03-30 22:17:45,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 22:17:45,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:17:45,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:17:45,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-30 22:17:45,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:45,569 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 13 treesize of output 9 [2023-03-30 22:17:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 22:17:45,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:52,437 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 17 treesize of output 15 [2023-03-30 22:17:52,439 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 16 treesize of output 12 [2023-03-30 22:17:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 22:17:52,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71468410] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:52,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:52,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 34 [2023-03-30 22:17:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33952350] [2023-03-30 22:17:52,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:52,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-03-30 22:17:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:52,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-03-30 22:17:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=981, Unknown=4, NotChecked=0, Total=1122 [2023-03-30 22:17:52,454 INFO L87 Difference]: Start difference. First operand 139 states and 159 transitions. Second operand has 34 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 12 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-03-30 22:17:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:17:53,579 INFO L93 Difference]: Finished difference Result 202 states and 233 transitions. [2023-03-30 22:17:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-03-30 22:17:53,580 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 12 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 57 [2023-03-30 22:17:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:17:53,592 INFO L225 Difference]: With dead ends: 202 [2023-03-30 22:17:53,592 INFO L226 Difference]: Without dead ends: 200 [2023-03-30 22:17:53,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 103 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=434, Invalid=3222, Unknown=4, NotChecked=0, Total=3660 [2023-03-30 22:17:53,593 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 145 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:17:53,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 202 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 22:17:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-03-30 22:17:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 159. [2023-03-30 22:17:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 121 states have (on average 1.140495867768595) internal successors, (138), 130 states have internal predecessors, (138), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-30 22:17:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 183 transitions. [2023-03-30 22:17:53,624 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 183 transitions. Word has length 57 [2023-03-30 22:17:53,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:17:53,625 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 183 transitions. [2023-03-30 22:17:53,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 12 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-03-30 22:17:53,625 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 183 transitions. [2023-03-30 22:17:53,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-03-30 22:17:53,626 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:17:53,626 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:17:53,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-03-30 22:17:53,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-03-30 22:17:53,831 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:17:53,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:17:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1536889223, now seen corresponding path program 3 times [2023-03-30 22:17:53,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:17:53,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642288001] [2023-03-30 22:17:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:17:53,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:17:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:54,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:17:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:54,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:17:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:54,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-03-30 22:17:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:54,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-03-30 22:17:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:54,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-30 22:17:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:17:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:17:54,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:17:54,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642288001] [2023-03-30 22:17:54,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642288001] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:17:54,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319664415] [2023-03-30 22:17:54,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:17:54,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:17:54,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:17:54,193 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:17:54,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 22:17:54,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-30 22:17:54,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:17:54,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2023-03-30 22:17:54,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:17:54,312 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 13 treesize of output 9 [2023-03-30 22:17:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:17:54,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:17:56,693 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 [2023-03-30 22:17:56,696 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 [2023-03-30 22:17:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:17:56,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319664415] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:17:56,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:17:56,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 31 [2023-03-30 22:17:56,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077983635] [2023-03-30 22:17:56,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:17:56,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-03-30 22:17:56,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:17:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-03-30 22:17:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=800, Unknown=1, NotChecked=0, Total=930 [2023-03-30 22:17:56,735 INFO L87 Difference]: Start difference. First operand 159 states and 183 transitions. Second operand has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 13 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-03-30 22:17:58,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:00,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:02,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:04,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:05,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:07,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:09,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:18:10,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]