/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/mlceu.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:54:14,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:54:14,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:54:14,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 18:54:14,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 18:54:14,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 18:54:14,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 18:54:14,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 18:54:14,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 18:54:14,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 18:54:14,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 18:54:14,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 18:54:14,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 18:54:14,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 18:54:14,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 18:54:14,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 18:54:14,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 18:54:14,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 18:54:14,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 18:54:14,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 18:54:14,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 18:54:14,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 18:54:14,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 18:54:14,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 18:54:14,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 18:54:14,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 18:54:14,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 18:54:14,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 18:54:14,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 18:54:14,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 18:54:14,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 18:54:14,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 18:54:14,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 18:54:14,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:54:14,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:54:14,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:54:14,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 18:54:14,458 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:54:14,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:54:14,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:54:14,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:54:14,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:54:14,459 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:54:14,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:54:14,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:54:14,460 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:54:14,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:54:14,460 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:54:14,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:54:14,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:54:14,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:54:14,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:54:14,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:54:14,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:54:14,464 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:54:14,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:54:14,464 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:54:14,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:54:14,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:54:14,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:54:14,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:54:14,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:54:14,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:54:14,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:54:14,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:54:14,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:54:14,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:54:14,466 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:54:14,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:54:14,467 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:54:14,467 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:54:14,467 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:54:14,467 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:54:14,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:54:14,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:54:14,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:54:14,718 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:54:14,720 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:54:14,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mlceu.c [2023-04-01 18:54:15,907 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:54:16,074 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:54:16,074 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu.c [2023-04-01 18:54:16,079 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9743947f6/2f839f610c6943b8a22a5b5ab87dd6ea/FLAG5883127c4 [2023-04-01 18:54:16,093 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9743947f6/2f839f610c6943b8a22a5b5ab87dd6ea [2023-04-01 18:54:16,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:54:16,097 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:54:16,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:54:16,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:54:16,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:54:16,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:54:16" (1/1) ... [2023-04-01 18:54:16,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64f0587d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:16, skipping insertion in model container [2023-04-01 18:54:16,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:54:16" (1/1) ... [2023-04-01 18:54:16,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:54:16,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:54:16,239 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/mlceu.c[396,409] [2023-04-01 18:54:16,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:54:16,259 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:54:16,269 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/mlceu.c[396,409] [2023-04-01 18:54:16,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:54:16,285 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:54:16,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:16 WrapperNode [2023-04-01 18:54:16,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:54:16,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:54:16,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:54:16,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:54:16,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:16" (1/1) ... [2023-04-01 18:54:16,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:16" (1/1) ... [2023-04-01 18:54:16,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:16" (1/1) ... [2023-04-01 18:54:16,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:16" (1/1) ... [2023-04-01 18:54:16,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:16" (1/1) ... [2023-04-01 18:54:16,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:16" (1/1) ... [2023-04-01 18:54:16,310 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:16" (1/1) ... [2023-04-01 18:54:16,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:16" (1/1) ... [2023-04-01 18:54:16,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:54:16,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:54:16,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:54:16,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:54:16,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:16" (1/1) ... [2023-04-01 18:54:16,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:54:16,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:16,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 18:54:16,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 18:54:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:54:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:54:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:54:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 18:54:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:54:16,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:54:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:54:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:54:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:54:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:54:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 18:54:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:54:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:54:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 18:54:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:54:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 18:54:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:54:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:54:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:54:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:54:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:54:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:54:16,432 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:54:16,434 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:54:16,575 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:54:16,581 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:54:16,582 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 18:54:16,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:54:16 BoogieIcfgContainer [2023-04-01 18:54:16,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:54:16,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:54:16,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:54:16,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:54:16,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:54:16" (1/3) ... [2023-04-01 18:54:16,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345c547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:54:16, skipping insertion in model container [2023-04-01 18:54:16,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:54:16" (2/3) ... [2023-04-01 18:54:16,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345c547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:54:16, skipping insertion in model container [2023-04-01 18:54:16,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:54:16" (3/3) ... [2023-04-01 18:54:16,618 INFO L112 eAbstractionObserver]: Analyzing ICFG mlceu.c [2023-04-01 18:54:16,647 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:54:16,647 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:54:16,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:54:16,743 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;@3acd7037, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:54:16,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:54:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:54:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 18:54:16,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:16,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:54:16,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:16,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:16,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1489266437, now seen corresponding path program 1 times [2023-04-01 18:54:16,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:16,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341927397] [2023-04-01 18:54:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:16,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:16,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:16,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:54:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:16,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:16,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341927397] [2023-04-01 18:54:16,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341927397] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:54:16,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:54:16,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:54:16,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027402261] [2023-04-01 18:54:16,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:54:16,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:54:16,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:16,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:54:16,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:54:16,982 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:54:17,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:17,084 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-04-01 18:54:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:54:17,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 20 [2023-04-01 18:54:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:17,092 INFO L225 Difference]: With dead ends: 54 [2023-04-01 18:54:17,093 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 18:54:17,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:54:17,103 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:17,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:54:17,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 18:54:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 18:54:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:54:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 18:54:17,148 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2023-04-01 18:54:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:17,149 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 18:54:17,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:54:17,150 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 18:54:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 18:54:17,151 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:17,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:54:17,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:54:17,152 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:17,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:17,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1017725116, now seen corresponding path program 1 times [2023-04-01 18:54:17,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:17,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122854263] [2023-04-01 18:54:17,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:17,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:17,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:17,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:54:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:17,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:17,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122854263] [2023-04-01 18:54:17,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122854263] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:54:17,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:54:17,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 18:54:17,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980360158] [2023-04-01 18:54:17,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:54:17,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 18:54:17,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:17,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 18:54:17,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:54:17,336 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:54:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:17,451 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2023-04-01 18:54:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 18:54:17,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 20 [2023-04-01 18:54:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:17,454 INFO L225 Difference]: With dead ends: 48 [2023-04-01 18:54:17,454 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 18:54:17,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:54:17,456 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:17,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:54:17,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 18:54:17,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-04-01 18:54:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:54:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-04-01 18:54:17,466 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2023-04-01 18:54:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:17,466 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-04-01 18:54:17,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:54:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-04-01 18:54:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 18:54:17,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:17,467 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] [2023-04-01 18:54:17,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:54:17,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:17,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:17,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2084860688, now seen corresponding path program 1 times [2023-04-01 18:54:17,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:17,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210473190] [2023-04-01 18:54:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:17,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:17,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:17,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:54:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:17,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:17,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210473190] [2023-04-01 18:54:17,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210473190] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:17,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27931536] [2023-04-01 18:54:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:17,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:17,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:17,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:54:17,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:54:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:18,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 18:54:18,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:18,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:54:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:18,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:54:18,207 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 14 treesize of output 12 [2023-04-01 18:54:18,211 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 [2023-04-01 18:54:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:18,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27931536] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:54:18,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:54:18,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2023-04-01 18:54:18,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804812697] [2023-04-01 18:54:18,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:54:18,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 18:54:18,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:18,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 18:54:18,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-04-01 18:54:18,247 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:54:18,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:18,449 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2023-04-01 18:54:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 18:54:18,449 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-04-01 18:54:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:18,452 INFO L225 Difference]: With dead ends: 41 [2023-04-01 18:54:18,452 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 18:54:18,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-04-01 18:54:18,456 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:18,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 102 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:54:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 18:54:18,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2023-04-01 18:54:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:54:18,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-04-01 18:54:18,472 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 23 [2023-04-01 18:54:18,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:18,472 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-04-01 18:54:18,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:54:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-04-01 18:54:18,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 18:54:18,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:18,474 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] [2023-04-01 18:54:18,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 18:54:18,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:18,681 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:18,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:18,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2074979430, now seen corresponding path program 1 times [2023-04-01 18:54:18,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:18,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3587349] [2023-04-01 18:54:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:18,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:18,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:18,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:54:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:18,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 18:54:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:18,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:18,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3587349] [2023-04-01 18:54:18,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3587349] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:18,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120376488] [2023-04-01 18:54:18,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:18,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:18,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:18,787 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:54:18,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:54:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:18,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:54:18,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:18,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:54:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:18,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120376488] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:54:18,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:54:18,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-04-01 18:54:18,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149979142] [2023-04-01 18:54:18,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:54:18,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 18:54:18,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:18,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 18:54:18,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:54:18,953 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 18:54:19,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:19,075 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2023-04-01 18:54:19,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 18:54:19,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2023-04-01 18:54:19,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:19,076 INFO L225 Difference]: With dead ends: 75 [2023-04-01 18:54:19,076 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 18:54:19,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-04-01 18:54:19,078 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:19,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 48 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:54:19,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 18:54:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2023-04-01 18:54:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:54:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-04-01 18:54:19,085 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2023-04-01 18:54:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:19,085 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-04-01 18:54:19,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 18:54:19,085 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-04-01 18:54:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 18:54:19,086 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:19,086 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] [2023-04-01 18:54:19,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:54:19,295 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,SelfDestructingSolverStorable3 [2023-04-01 18:54:19,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:19,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:19,296 INFO L85 PathProgramCache]: Analyzing trace with hash 902397330, now seen corresponding path program 2 times [2023-04-01 18:54:19,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:19,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037650442] [2023-04-01 18:54:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:19,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:19,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:19,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:54:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:19,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 18:54:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:19,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:19,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037650442] [2023-04-01 18:54:19,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037650442] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:19,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904431106] [2023-04-01 18:54:19,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:54:19,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:19,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:19,624 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:54:19,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:54:19,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:54:19,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:54:19,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 18:54:19,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:19,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:54:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:19,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:54:19,926 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 16 treesize of output 14 [2023-04-01 18:54:19,932 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 [2023-04-01 18:54:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:54:19,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904431106] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:54:19,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:54:19,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2023-04-01 18:54:19,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650280469] [2023-04-01 18:54:19,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:54:19,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 18:54:19,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:19,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 18:54:19,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-04-01 18:54:19,972 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 18:54:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:20,260 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2023-04-01 18:54:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 18:54:20,260 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2023-04-01 18:54:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:20,261 INFO L225 Difference]: With dead ends: 52 [2023-04-01 18:54:20,261 INFO L226 Difference]: Without dead ends: 50 [2023-04-01 18:54:20,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:54:20,262 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:20,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 133 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:54:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-01 18:54:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-04-01 18:54:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 18:54:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2023-04-01 18:54:20,270 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 34 [2023-04-01 18:54:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:20,270 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2023-04-01 18:54:20,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 18:54:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2023-04-01 18:54:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 18:54:20,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:20,272 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 18:54:20,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:54:20,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:20,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:20,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:20,473 INFO L85 PathProgramCache]: Analyzing trace with hash -683076376, now seen corresponding path program 3 times [2023-04-01 18:54:20,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:20,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147354120] [2023-04-01 18:54:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:20,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:20,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:20,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:54:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:20,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 18:54:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:20,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-04-01 18:54:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:54:20,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:20,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147354120] [2023-04-01 18:54:20,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147354120] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:20,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981597732] [2023-04-01 18:54:20,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:54:20,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:20,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:20,611 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:54:20,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:54:20,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 18:54:20,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:54:20,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 18:54:20,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:54:20,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:54:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:54:20,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981597732] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:54:20,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:54:20,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2023-04-01 18:54:20,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201016552] [2023-04-01 18:54:20,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:54:20,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 18:54:20,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:20,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 18:54:20,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-01 18:54:20,829 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 18:54:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:20,985 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2023-04-01 18:54:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 18:54:20,991 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 42 [2023-04-01 18:54:20,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:20,994 INFO L225 Difference]: With dead ends: 102 [2023-04-01 18:54:20,994 INFO L226 Difference]: Without dead ends: 56 [2023-04-01 18:54:20,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2023-04-01 18:54:20,998 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:20,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 45 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:54:20,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-01 18:54:21,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2023-04-01 18:54:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 18:54:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2023-04-01 18:54:21,014 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 42 [2023-04-01 18:54:21,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:21,014 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2023-04-01 18:54:21,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 18:54:21,014 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2023-04-01 18:54:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 18:54:21,016 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:21,016 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:54:21,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:54:21,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:21,227 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:21,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:21,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1462169540, now seen corresponding path program 4 times [2023-04-01 18:54:21,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:21,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307314207] [2023-04-01 18:54:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:21,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:21,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:21,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:54:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:21,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 18:54:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:21,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 18:54:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:54:21,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:21,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307314207] [2023-04-01 18:54:21,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307314207] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:21,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128148453] [2023-04-01 18:54:21,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:54:21,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:21,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:21,613 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:54:21,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:54:21,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:54:21,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:54:21,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-01 18:54:21,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:21,721 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 [2023-04-01 18:54:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:54:21,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:54:28,123 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 16 treesize of output 14 [2023-04-01 18:54:28,126 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 [2023-04-01 18:54:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:54:28,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128148453] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:54:28,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:54:28,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 12] total 28 [2023-04-01 18:54:28,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358030802] [2023-04-01 18:54:28,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:54:28,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 18:54:28,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:28,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 18:54:28,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=656, Unknown=3, NotChecked=0, Total=756 [2023-04-01 18:54:28,145 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 8 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 18:54:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:28,708 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2023-04-01 18:54:28,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 18:54:28,708 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 8 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2023-04-01 18:54:28,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:28,709 INFO L225 Difference]: With dead ends: 63 [2023-04-01 18:54:28,709 INFO L226 Difference]: Without dead ends: 61 [2023-04-01 18:54:28,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=224, Invalid=1579, Unknown=3, NotChecked=0, Total=1806 [2023-04-01 18:54:28,710 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:28,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 145 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:54:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-01 18:54:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2023-04-01 18:54:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 18:54:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2023-04-01 18:54:28,718 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 45 [2023-04-01 18:54:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:28,718 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2023-04-01 18:54:28,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 8 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 18:54:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2023-04-01 18:54:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 18:54:28,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:28,720 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:54:28,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 18:54:28,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:28,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:28,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1209556370, now seen corresponding path program 5 times [2023-04-01 18:54:28,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:28,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519516203] [2023-04-01 18:54:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:28,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:29,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:29,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:54:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:29,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 18:54:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:29,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 18:54:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:29,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 18:54:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:54:29,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519516203] [2023-04-01 18:54:29,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519516203] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333700445] [2023-04-01 18:54:29,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:54:29,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:29,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:29,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:54:29,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:54:29,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-04-01 18:54:29,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:54:29,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 18:54:29,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:54:29,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:54:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:54:29,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333700445] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:54:29,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:54:29,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2023-04-01 18:54:29,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530025323] [2023-04-01 18:54:29,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:54:29,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 18:54:29,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:29,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 18:54:29,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-04-01 18:54:29,369 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 18:54:29,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:29,550 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2023-04-01 18:54:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 18:54:29,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 53 [2023-04-01 18:54:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:29,551 INFO L225 Difference]: With dead ends: 129 [2023-04-01 18:54:29,551 INFO L226 Difference]: Without dead ends: 67 [2023-04-01 18:54:29,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2023-04-01 18:54:29,553 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:29,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:54:29,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-01 18:54:29,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2023-04-01 18:54:29,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 18:54:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-04-01 18:54:29,560 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2023-04-01 18:54:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:29,561 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-04-01 18:54:29,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 18:54:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-04-01 18:54:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 18:54:29,571 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:29,571 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:54:29,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 18:54:29,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:29,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:29,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:29,780 INFO L85 PathProgramCache]: Analyzing trace with hash -359152194, now seen corresponding path program 6 times [2023-04-01 18:54:29,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:29,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811216492] [2023-04-01 18:54:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:29,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:30,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:30,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:54:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:30,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 18:54:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:30,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-01 18:54:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:30,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-04-01 18:54:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:54:30,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:30,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811216492] [2023-04-01 18:54:30,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811216492] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:30,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437145674] [2023-04-01 18:54:30,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:54:30,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:30,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:30,148 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:54:30,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 18:54:30,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-04-01 18:54:30,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:54:30,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 18:54:30,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:30,297 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 15 treesize of output 11 [2023-04-01 18:54:30,884 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 18:54:30,885 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 23 treesize of output 10 [2023-04-01 18:54:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:54:30,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:54:31,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437145674] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:31,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 18:54:31,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 29 [2023-04-01 18:54:31,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992593673] [2023-04-01 18:54:31,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 18:54:31,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 18:54:31,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:31,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 18:54:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2023-04-01 18:54:31,030 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 26 states have internal predecessors, (69), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 18:54:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:32,320 INFO L93 Difference]: Finished difference Result 148 states and 157 transitions. [2023-04-01 18:54:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 18:54:32,321 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 26 states have internal predecessors, (69), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 56 [2023-04-01 18:54:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:32,321 INFO L225 Difference]: With dead ends: 148 [2023-04-01 18:54:32,321 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 18:54:32,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=355, Invalid=2401, Unknown=0, NotChecked=0, Total=2756 [2023-04-01 18:54:32,323 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 65 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:32,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 187 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 703 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 18:54:32,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 18:54:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2023-04-01 18:54:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 18:54:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2023-04-01 18:54:32,333 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 56 [2023-04-01 18:54:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:32,333 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2023-04-01 18:54:32,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 26 states have internal predecessors, (69), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 18:54:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2023-04-01 18:54:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 18:54:32,334 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:32,334 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:54:32,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 18:54:32,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:32,542 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:32,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:32,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1055552872, now seen corresponding path program 7 times [2023-04-01 18:54:32,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:32,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88949646] [2023-04-01 18:54:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:32,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:32,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:32,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:54:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:32,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 18:54:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:32,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-04-01 18:54:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:32,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-04-01 18:54:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:32,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-04-01 18:54:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:54:32,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:32,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88949646] [2023-04-01 18:54:32,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88949646] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:32,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431748211] [2023-04-01 18:54:32,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 18:54:32,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:32,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:32,967 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:54:32,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 18:54:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:33,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-01 18:54:33,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:33,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:54:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:54:33,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:54:33,722 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 16 treesize of output 14 [2023-04-01 18:54:33,724 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 [2023-04-01 18:54:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:54:33,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431748211] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:54:33,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:54:33,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 33 [2023-04-01 18:54:33,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739993062] [2023-04-01 18:54:33,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:54:33,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 18:54:33,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:33,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 18:54:33,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 18:54:33,770 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 33 states, 32 states have (on average 2.71875) internal successors, (87), 30 states have internal predecessors, (87), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-01 18:54:34,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:34,372 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2023-04-01 18:54:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 18:54:34,373 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.71875) internal successors, (87), 30 states have internal predecessors, (87), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 67 [2023-04-01 18:54:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:34,374 INFO L225 Difference]: With dead ends: 85 [2023-04-01 18:54:34,374 INFO L226 Difference]: Without dead ends: 83 [2023-04-01 18:54:34,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 18:54:34,375 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:34,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 305 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 18:54:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-04-01 18:54:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2023-04-01 18:54:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 62 states have internal predecessors, (64), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 18:54:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2023-04-01 18:54:34,385 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 67 [2023-04-01 18:54:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:34,386 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2023-04-01 18:54:34,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.71875) internal successors, (87), 30 states have internal predecessors, (87), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-01 18:54:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2023-04-01 18:54:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 18:54:34,387 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:34,387 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:54:34,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 18:54:34,590 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,SelfDestructingSolverStorable9 [2023-04-01 18:54:34,591 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:34,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1195911490, now seen corresponding path program 8 times [2023-04-01 18:54:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:34,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908327586] [2023-04-01 18:54:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:34,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:34,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:54:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:34,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 18:54:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:34,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-04-01 18:54:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:34,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-04-01 18:54:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:34,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-04-01 18:54:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:34,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-04-01 18:54:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 43 proven. 52 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 18:54:34,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:34,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908327586] [2023-04-01 18:54:34,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908327586] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:34,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020492980] [2023-04-01 18:54:34,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:54:34,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:34,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:34,832 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) [2023-04-01 18:54:34,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 18:54:34,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:54:34,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:54:34,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 18:54:34,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 35 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 18:54:35,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:54:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 35 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 18:54:35,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020492980] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:54:35,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:54:35,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2023-04-01 18:54:35,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051511332] [2023-04-01 18:54:35,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:54:35,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 18:54:35,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:35,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 18:54:35,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2023-04-01 18:54:35,243 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 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) [2023-04-01 18:54:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:35,518 INFO L93 Difference]: Finished difference Result 183 states and 190 transitions. [2023-04-01 18:54:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 18:54:35,518 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 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) Word has length 75 [2023-04-01 18:54:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:35,519 INFO L225 Difference]: With dead ends: 183 [2023-04-01 18:54:35,519 INFO L226 Difference]: Without dead ends: 89 [2023-04-01 18:54:35,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2023-04-01 18:54:35,521 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 59 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:35,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 106 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:54:35,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-04-01 18:54:35,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2023-04-01 18:54:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.046875) internal successors, (67), 65 states have internal predecessors, (67), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 18:54:35,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2023-04-01 18:54:35,534 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 75 [2023-04-01 18:54:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:35,534 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2023-04-01 18:54:35,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 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) [2023-04-01 18:54:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2023-04-01 18:54:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 18:54:35,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:35,537 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:54:35,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 18:54:35,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:35,748 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:35,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:35,748 INFO L85 PathProgramCache]: Analyzing trace with hash -926968342, now seen corresponding path program 9 times [2023-04-01 18:54:35,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:35,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012755037] [2023-04-01 18:54:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:35,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:36,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:36,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:54:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:36,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-04-01 18:54:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:36,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 18:54:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:36,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-04-01 18:54:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:36,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-04-01 18:54:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:36,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-04-01 18:54:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 101 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 18:54:36,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:36,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012755037] [2023-04-01 18:54:36,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012755037] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:36,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219483269] [2023-04-01 18:54:36,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:54:36,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:36,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:36,239 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:54:36,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 18:54:36,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-01 18:54:36,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:54:36,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 18:54:36,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:36,683 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 15 treesize of output 11 [2023-04-01 18:54:37,757 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 18:54:37,758 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 23 treesize of output 10 [2023-04-01 18:54:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 45 proven. 66 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 18:54:37,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:54:37,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219483269] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:37,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 18:54:37,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2023-04-01 18:54:37,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264087724] [2023-04-01 18:54:37,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 18:54:37,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-04-01 18:54:37,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:54:37,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-04-01 18:54:37,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 18:54:37,901 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 38 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 35 states have internal predecessors, (93), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 18:54:40,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:54:40,055 INFO L93 Difference]: Finished difference Result 203 states and 212 transitions. [2023-04-01 18:54:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-04-01 18:54:40,056 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 35 states have internal predecessors, (93), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 78 [2023-04-01 18:54:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:54:40,057 INFO L225 Difference]: With dead ends: 203 [2023-04-01 18:54:40,057 INFO L226 Difference]: Without dead ends: 101 [2023-04-01 18:54:40,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 71 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=565, Invalid=4837, Unknown=0, NotChecked=0, Total=5402 [2023-04-01 18:54:40,059 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 158 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 121 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:54:40,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 220 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1128 Invalid, 1 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 18:54:40,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-04-01 18:54:40,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2023-04-01 18:54:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 18:54:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2023-04-01 18:54:40,071 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 78 [2023-04-01 18:54:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:54:40,072 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2023-04-01 18:54:40,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 35 states have internal predecessors, (93), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 18:54:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2023-04-01 18:54:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 18:54:40,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:54:40,073 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:54:40,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 18:54:40,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 18:54:40,278 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:54:40,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:54:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash -927948140, now seen corresponding path program 10 times [2023-04-01 18:54:40,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:54:40,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979590840] [2023-04-01 18:54:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:54:40,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:54:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:40,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:54:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:40,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:54:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:40,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 18:54:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:40,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:54:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:40,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 18:54:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:40,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 18:54:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:40,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 18:54:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:40,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 18:54:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:54:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 12 proven. 142 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 18:54:40,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:54:40,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979590840] [2023-04-01 18:54:40,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979590840] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:54:40,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762635970] [2023-04-01 18:54:40,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:54:40,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:54:40,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:54:40,887 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:54:40,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 18:54:40,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:54:40,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:54:40,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-01 18:54:40,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:54:41,011 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 15 treesize of output 11 [2023-04-01 18:55:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 6 proven. 163 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 18:55:53,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:55:55,796 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 16 treesize of output 14 [2023-04-01 18:55:55,821 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 [2023-04-01 18:55:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 12 proven. 142 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 18:55:55,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762635970] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:55:55,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:55:55,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 20] total 33 [2023-04-01 18:55:55,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419093443] [2023-04-01 18:55:55,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:55:55,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 18:55:55,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:55,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 18:55:55,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=952, Unknown=7, NotChecked=0, Total=1056 [2023-04-01 18:55:55,880 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 33 states, 32 states have (on average 2.75) internal successors, (88), 30 states have internal predecessors, (88), 14 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-04-01 18:56:00,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:06,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:08,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:12,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:14,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:18,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:22,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:28,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:28,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:28,834 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2023-04-01 18:56:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-01 18:56:28,835 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.75) internal successors, (88), 30 states have internal predecessors, (88), 14 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 89 [2023-04-01 18:56:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:28,835 INFO L225 Difference]: With dead ends: 107 [2023-04-01 18:56:28,836 INFO L226 Difference]: Without dead ends: 105 [2023-04-01 18:56:28,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 169 SyntacticMatches, 16 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 91.1s TimeCoverageRelationStatistics Valid=259, Invalid=2808, Unknown=13, NotChecked=0, Total=3080 [2023-04-01 18:56:28,837 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 36 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:28,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 337 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1395 Invalid, 8 Unknown, 0 Unchecked, 16.6s Time] [2023-04-01 18:56:28,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-01 18:56:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2023-04-01 18:56:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 80 states have internal predecessors, (82), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:56:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2023-04-01 18:56:28,850 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 89 [2023-04-01 18:56:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:28,851 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2023-04-01 18:56:28,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.75) internal successors, (88), 30 states have internal predecessors, (88), 14 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-04-01 18:56:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2023-04-01 18:56:28,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 18:56:28,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:28,852 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:28,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:29,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 18:56:29,061 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:29,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:29,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1614538774, now seen corresponding path program 11 times [2023-04-01 18:56:29,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:29,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760293745] [2023-04-01 18:56:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:29,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:29,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:29,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:56:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:29,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 18:56:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:29,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:56:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:29,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 18:56:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:29,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 18:56:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:29,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 18:56:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:29,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 18:56:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:29,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 18:56:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 87 proven. 95 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 18:56:29,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:29,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760293745] [2023-04-01 18:56:29,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760293745] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:29,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413639544] [2023-04-01 18:56:29,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:56:29,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:29,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:29,376 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:56:29,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 18:56:29,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-04-01 18:56:29,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:56:29,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 18:56:29,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 112 proven. 70 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 18:56:29,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 112 proven. 70 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 18:56:29,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413639544] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:29,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:29,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2023-04-01 18:56:29,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940587397] [2023-04-01 18:56:29,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:29,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-01 18:56:29,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:29,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-01 18:56:29,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2023-04-01 18:56:29,981 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 29 states have internal predecessors, (94), 17 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-01 18:56:30,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:30,302 INFO L93 Difference]: Finished difference Result 237 states and 244 transitions. [2023-04-01 18:56:30,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 18:56:30,303 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 29 states have internal predecessors, (94), 17 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 97 [2023-04-01 18:56:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:30,303 INFO L225 Difference]: With dead ends: 237 [2023-04-01 18:56:30,304 INFO L226 Difference]: Without dead ends: 111 [2023-04-01 18:56:30,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 187 SyntacticMatches, 15 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=1141, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 18:56:30,305 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:30,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 137 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:56:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-01 18:56:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2023-04-01 18:56:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 states have internal predecessors, (85), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:56:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2023-04-01 18:56:30,319 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2023-04-01 18:56:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:30,319 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2023-04-01 18:56:30,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 29 states have internal predecessors, (94), 17 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-01 18:56:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2023-04-01 18:56:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 18:56:30,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:30,320 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:30,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:30,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 18:56:30,526 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:30,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:30,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1570181610, now seen corresponding path program 12 times [2023-04-01 18:56:30,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:30,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035138123] [2023-04-01 18:56:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:30,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:56:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-04-01 18:56:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-04-01 18:56:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-04-01 18:56:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-04-01 18:56:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-04-01 18:56:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-04-01 18:56:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-04-01 18:56:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 14 proven. 190 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 18:56:31,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:31,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035138123] [2023-04-01 18:56:31,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035138123] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:31,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20729310] [2023-04-01 18:56:31,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:56:31,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:31,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:31,137 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:56:31,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 18:56:31,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-04-01 18:56:31,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:56:31,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 18:56:31,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:31,470 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 15 treesize of output 11 [2023-04-01 18:56:40,923 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 18:56:40,923 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 23 treesize of output 10 [2023-04-01 18:56:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 91 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 18:56:40,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:41,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20729310] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:41,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 18:56:41,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2023-04-01 18:56:41,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111369853] [2023-04-01 18:56:41,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:41,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-01 18:56:41,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:41,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-01 18:56:41,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2025, Unknown=2, NotChecked=0, Total=2256 [2023-04-01 18:56:41,086 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 46 states, 45 states have (on average 2.6) internal successors, (117), 43 states have internal predecessors, (117), 16 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 18:56:54,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:54,278 INFO L93 Difference]: Finished difference Result 257 states and 266 transitions. [2023-04-01 18:56:54,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-01 18:56:54,278 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.6) internal successors, (117), 43 states have internal predecessors, (117), 16 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 100 [2023-04-01 18:56:54,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:54,280 INFO L225 Difference]: With dead ends: 257 [2023-04-01 18:56:54,280 INFO L226 Difference]: Without dead ends: 123 [2023-04-01 18:56:54,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 89 SyntacticMatches, 13 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=761, Invalid=7242, Unknown=7, NotChecked=0, Total=8010 [2023-04-01 18:56:54,283 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 205 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 158 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:54,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 311 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1611 Invalid, 1 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 18:56:54,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-04-01 18:56:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 115. [2023-04-01 18:56:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 91 states have (on average 1.032967032967033) internal successors, (94), 92 states have internal predecessors, (94), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 18:56:54,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2023-04-01 18:56:54,299 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 100 [2023-04-01 18:56:54,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:54,299 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2023-04-01 18:56:54,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.6) internal successors, (117), 43 states have internal predecessors, (117), 16 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 18:56:54,300 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2023-04-01 18:56:54,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 18:56:54,300 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:54,300 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:54,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:54,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 18:56:54,507 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:54,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:54,507 INFO L85 PathProgramCache]: Analyzing trace with hash 442734528, now seen corresponding path program 13 times [2023-04-01 18:56:54,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:54,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502254679] [2023-04-01 18:56:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:54,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:55,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:55,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:56:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:55,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 18:56:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:55,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 18:56:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:55,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 18:56:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:55,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 18:56:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:55,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 18:56:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:55,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 18:56:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:55,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 18:56:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:55,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-04-01 18:56:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 16 proven. 245 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 18:56:55,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:55,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502254679] [2023-04-01 18:56:55,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502254679] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:55,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360608785] [2023-04-01 18:56:55,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 18:56:55,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:55,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:55,145 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:56:55,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 18:56:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:55,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 18:56:55,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:55,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:56:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 18:56:56,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:56,599 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 16 treesize of output 14 [2023-04-01 18:56:56,602 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 [2023-04-01 18:56:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 16 proven. 245 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 18:56:56,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360608785] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:56,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:56,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 24] total 49 [2023-04-01 18:56:56,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916621076] [2023-04-01 18:56:56,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:56,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 18:56:56,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:56,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 18:56:56,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2182, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 18:56:56,679 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 49 states, 48 states have (on average 2.8125) internal successors, (135), 46 states have internal predecessors, (135), 19 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-04-01 18:56:57,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:57,905 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2023-04-01 18:56:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-01 18:56:57,906 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.8125) internal successors, (135), 46 states have internal predecessors, (135), 19 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 111 [2023-04-01 18:56:57,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:57,907 INFO L225 Difference]: With dead ends: 129 [2023-04-01 18:56:57,907 INFO L226 Difference]: Without dead ends: 127 [2023-04-01 18:56:57,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 203 SyntacticMatches, 17 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=257, Invalid=3649, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 18:56:57,908 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 33 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 2678 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:57,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 676 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2678 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 18:56:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-04-01 18:56:57,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2023-04-01 18:56:57,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 98 states have internal predecessors, (100), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 18:56:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2023-04-01 18:56:57,927 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 111 [2023-04-01 18:56:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:57,928 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2023-04-01 18:56:57,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.8125) internal successors, (135), 46 states have internal predecessors, (135), 19 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-04-01 18:56:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2023-04-01 18:56:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 18:56:57,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:57,929 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:57,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:58,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:58,133 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:58,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:58,133 INFO L85 PathProgramCache]: Analyzing trace with hash 427106582, now seen corresponding path program 14 times [2023-04-01 18:56:58,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:58,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563839796] [2023-04-01 18:56:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:58,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:56:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 18:56:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 18:56:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 18:56:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 18:56:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 18:56:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 18:56:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 18:56:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-04-01 18:56:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-04-01 18:56:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 147 proven. 150 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-04-01 18:56:58,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:58,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563839796] [2023-04-01 18:56:58,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563839796] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:58,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483110966] [2023-04-01 18:56:58,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:56:58,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:58,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:58,527 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:56:58,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 18:56:58,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:56:58,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:56:58,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 18:56:58,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 180 proven. 117 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-04-01 18:56:59,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 180 proven. 117 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-04-01 18:56:59,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483110966] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:59,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:59,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2023-04-01 18:56:59,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570036101] [2023-04-01 18:56:59,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:59,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 18:56:59,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:59,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 18:56:59,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 18:56:59,278 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 35 states have internal predecessors, (112), 21 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2023-04-01 18:56:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:59,718 INFO L93 Difference]: Finished difference Result 291 states and 298 transitions. [2023-04-01 18:56:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 18:56:59,718 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 35 states have internal predecessors, (112), 21 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 119 [2023-04-01 18:56:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:59,719 INFO L225 Difference]: With dead ends: 291 [2023-04-01 18:56:59,719 INFO L226 Difference]: Without dead ends: 133 [2023-04-01 18:56:59,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 229 SyntacticMatches, 19 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=492, Invalid=1670, Unknown=0, NotChecked=0, Total=2162 [2023-04-01 18:56:59,721 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 103 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:59,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 153 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:56:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-04-01 18:56:59,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 126. [2023-04-01 18:56:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 100 states have (on average 1.03) internal successors, (103), 101 states have internal predecessors, (103), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 18:56:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2023-04-01 18:56:59,738 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 119 [2023-04-01 18:56:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:59,739 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2023-04-01 18:56:59,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 35 states have internal predecessors, (112), 21 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2023-04-01 18:56:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2023-04-01 18:56:59,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-01 18:56:59,740 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:59,740 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:59,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:59,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-01 18:56:59,946 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:59,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:59,946 INFO L85 PathProgramCache]: Analyzing trace with hash -4469182, now seen corresponding path program 15 times [2023-04-01 18:56:59,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:59,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215052533] [2023-04-01 18:56:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:59,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:00,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:57:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:00,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:57:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:00,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-04-01 18:57:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:00,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-04-01 18:57:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:00,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-04-01 18:57:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:00,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-04-01 18:57:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:00,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-04-01 18:57:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:00,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2023-04-01 18:57:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:00,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-04-01 18:57:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:00,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-04-01 18:57:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:00,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-04-01 18:57:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 18 proven. 307 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-04-01 18:57:00,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:57:00,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215052533] [2023-04-01 18:57:00,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215052533] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:57:00,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865677286] [2023-04-01 18:57:00,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:57:00,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:00,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:57:00,721 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:57:00,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-01 18:57:01,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-04-01 18:57:01,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:57:01,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-01 18:57:01,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:57:01,312 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 15 treesize of output 11 [2023-04-01 18:57:05,519 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 18:57:05,519 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 23 treesize of output 10 [2023-04-01 18:57:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 153 proven. 172 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-04-01 18:57:05,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:57:05,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865677286] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:57:05,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 18:57:05,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2023-04-01 18:57:05,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761810353] [2023-04-01 18:57:05,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 18:57:05,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-04-01 18:57:05,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:57:05,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-04-01 18:57:05,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2872, Unknown=1, NotChecked=0, Total=3192 [2023-04-01 18:57:05,718 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 55 states, 54 states have (on average 2.611111111111111) internal successors, (141), 52 states have internal predecessors, (141), 20 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-04-01 18:57:09,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:57:09,033 INFO L93 Difference]: Finished difference Result 311 states and 320 transitions. [2023-04-01 18:57:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-04-01 18:57:09,034 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.611111111111111) internal successors, (141), 52 states have internal predecessors, (141), 20 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 122 [2023-04-01 18:57:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:57:09,035 INFO L225 Difference]: With dead ends: 311 [2023-04-01 18:57:09,035 INFO L226 Difference]: Without dead ends: 145 [2023-04-01 18:57:09,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 107 SyntacticMatches, 16 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2702 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1025, Invalid=10316, Unknown=1, NotChecked=0, Total=11342 [2023-04-01 18:57:09,038 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 203 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 159 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 18:57:09,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 454 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2361 Invalid, 1 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 18:57:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-04-01 18:57:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 137. [2023-04-01 18:57:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 110 states have internal predecessors, (112), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 18:57:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2023-04-01 18:57:09,056 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 122 [2023-04-01 18:57:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:57:09,057 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2023-04-01 18:57:09,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.611111111111111) internal successors, (141), 52 states have internal predecessors, (141), 20 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-04-01 18:57:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2023-04-01 18:57:09,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 18:57:09,058 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:57:09,058 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:57:09,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-01 18:57:09,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 18:57:09,259 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:57:09,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:57:09,259 INFO L85 PathProgramCache]: Analyzing trace with hash -767863572, now seen corresponding path program 16 times [2023-04-01 18:57:09,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:57:09,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465038172] [2023-04-01 18:57:09,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:57:09,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:57:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:10,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:57:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:10,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 18:57:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:10,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-04-01 18:57:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:10,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-04-01 18:57:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:10,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-04-01 18:57:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:10,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-04-01 18:57:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:10,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-04-01 18:57:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:10,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-04-01 18:57:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:10,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-04-01 18:57:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:10,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-04-01 18:57:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:10,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-04-01 18:57:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:10,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-04-01 18:57:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 20 proven. 376 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-01 18:57:10,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:57:10,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465038172] [2023-04-01 18:57:10,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465038172] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:57:10,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617258494] [2023-04-01 18:57:10,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:57:10,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:10,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:57:10,076 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:57:10,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-01 18:57:10,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:57:10,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:57:10,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 61 conjunts are in the unsatisfiable core [2023-04-01 18:57:10,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:57:10,276 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 15 treesize of output 11