/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/pnr3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:55:58,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:55:58,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:55:58,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 18:55:58,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 18:55:58,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 18:55:58,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 18:55:58,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 18:55:58,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 18:55:58,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 18:55:58,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 18:55:58,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 18:55:58,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 18:55:58,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 18:55:58,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 18:55:58,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 18:55:58,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 18:55:58,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 18:55:58,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 18:55:58,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 18:55:58,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 18:55:58,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 18:55:58,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 18:55:58,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 18:55:58,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 18:55:58,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 18:55:58,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 18:55:58,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 18:55:58,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 18:55:58,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 18:55:58,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 18:55:58,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 18:55:58,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 18:55:58,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:55:58,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:55:58,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:55:58,472 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 18:55:58,499 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:55:58,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:55:58,500 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:55:58,500 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:55:58,501 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:55:58,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:55:58,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:55:58,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:55:58,502 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:55:58,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:55:58,503 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:55:58,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:55:58,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:55:58,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:55:58,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:55:58,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:55:58,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:55:58,503 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:55:58,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:55:58,504 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:55:58,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:55:58,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:55:58,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:55:58,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:55:58,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:55:58,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:55:58,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:55:58,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:55:58,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:55:58,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:55:58,505 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:55:58,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:55:58,505 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:55:58,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:55:58,506 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:55:58,506 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:55:58,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:55:58,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:55:58,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:55:58,728 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:55:58,728 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:55:58,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr3.c [2023-04-01 18:55:59,813 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:55:59,942 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:55:59,943 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c [2023-04-01 18:55:59,946 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fd3778bb/949710f3de524dfa9e4fd6b789c1babf/FLAG4ec38e2ed [2023-04-01 18:55:59,956 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fd3778bb/949710f3de524dfa9e4fd6b789c1babf [2023-04-01 18:55:59,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:55:59,960 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:55:59,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:55:59,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:55:59,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:55:59,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:55:59" (1/1) ... [2023-04-01 18:55:59,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43de3733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:59, skipping insertion in model container [2023-04-01 18:55:59,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:55:59" (1/1) ... [2023-04-01 18:55:59,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:55:59,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:56:00,114 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/pnr3.c[395,408] [2023-04-01 18:56:00,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:56:00,160 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:56:00,172 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/pnr3.c[395,408] [2023-04-01 18:56:00,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:56:00,202 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:56:00,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:56:00 WrapperNode [2023-04-01 18:56:00,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:56:00,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:56:00,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:56:00,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:56:00,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:56:00" (1/1) ... [2023-04-01 18:56:00,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:56:00" (1/1) ... [2023-04-01 18:56:00,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:56:00" (1/1) ... [2023-04-01 18:56:00,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:56:00" (1/1) ... [2023-04-01 18:56:00,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:56:00" (1/1) ... [2023-04-01 18:56:00,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:56:00" (1/1) ... [2023-04-01 18:56:00,249 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:56:00" (1/1) ... [2023-04-01 18:56:00,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:56:00" (1/1) ... [2023-04-01 18:56:00,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:56:00,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:56:00,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:56:00,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:56:00,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:56:00" (1/1) ... [2023-04-01 18:56:00,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:56:00,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:00,279 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 18:56:00,292 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 18:56:00,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:56:00,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:56:00,315 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:56:00,315 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 18:56:00,315 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:56:00,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2023-04-01 18:56:00,315 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:56:00,315 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:56:00,315 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:56:00,315 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:56:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:56:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 18:56:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:56:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:56:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 18:56:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2023-04-01 18:56:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:56:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 18:56:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:56:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:56:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:56:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:56:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:56:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:56:00,379 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:56:00,380 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:56:00,572 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:56:00,577 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:56:00,577 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 18:56:00,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:56:00 BoogieIcfgContainer [2023-04-01 18:56:00,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:56:00,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:56:00,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:56:00,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:56:00,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:55:59" (1/3) ... [2023-04-01 18:56:00,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a73d592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:56:00, skipping insertion in model container [2023-04-01 18:56:00,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:56:00" (2/3) ... [2023-04-01 18:56:00,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a73d592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:56:00, skipping insertion in model container [2023-04-01 18:56:00,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:56:00" (3/3) ... [2023-04-01 18:56:00,585 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr3.c [2023-04-01 18:56:00,599 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:56:00,599 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:56:00,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:56:00,642 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;@22948f7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:56:00,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:56:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 30 states have (on average 1.4) internal successors, (42), 31 states have internal predecessors, (42), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 18:56:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 18:56:00,651 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:00,652 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] [2023-04-01 18:56:00,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:00,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1847036751, now seen corresponding path program 1 times [2023-04-01 18:56:00,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:00,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64251774] [2023-04-01 18:56:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:00,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:00,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:00,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:00,857 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 18:56:00,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:00,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64251774] [2023-04-01 18:56:00,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64251774] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:56:00,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:56:00,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:56:00,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183762879] [2023-04-01 18:56:00,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:56:00,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:56:00,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:00,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:56:00,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:56:00,895 INFO L87 Difference]: Start difference. First operand has 44 states, 30 states have (on average 1.4) internal successors, (42), 31 states have internal predecessors, (42), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 18:56:01,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:01,026 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2023-04-01 18:56:01,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:56:01,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 21 [2023-04-01 18:56:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:01,033 INFO L225 Difference]: With dead ends: 77 [2023-04-01 18:56:01,033 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 18:56:01,035 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 18:56:01,039 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:01,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 45 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:56:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 18:56:01,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-01 18:56:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 18:56:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2023-04-01 18:56:01,080 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 21 [2023-04-01 18:56:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:01,081 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2023-04-01 18:56:01,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 18:56:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2023-04-01 18:56:01,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 18:56:01,083 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:01,084 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] [2023-04-01 18:56:01,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:56:01,084 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:01,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:01,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1714668940, now seen corresponding path program 1 times [2023-04-01 18:56:01,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:01,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127539805] [2023-04-01 18:56:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:01,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:01,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:01,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:01,399 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 18:56:01,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:01,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127539805] [2023-04-01 18:56:01,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127539805] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:56:01,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:56:01,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 18:56:01,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159750] [2023-04-01 18:56:01,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:56:01,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:56:01,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:01,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:56:01,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:56:01,410 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 18:56:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:01,590 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2023-04-01 18:56:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:56:01,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 21 [2023-04-01 18:56:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:01,594 INFO L225 Difference]: With dead ends: 61 [2023-04-01 18:56:01,594 INFO L226 Difference]: Without dead ends: 50 [2023-04-01 18:56:01,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:56:01,604 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:01,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 28 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:56:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-01 18:56:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2023-04-01 18:56:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 18:56:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-04-01 18:56:01,617 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 21 [2023-04-01 18:56:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:01,617 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-04-01 18:56:01,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 18:56:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-04-01 18:56:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 18:56:01,618 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:01,618 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:01,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:56:01,618 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:01,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash 780045924, now seen corresponding path program 1 times [2023-04-01 18:56:01,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:01,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401349708] [2023-04-01 18:56:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:01,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:56:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:56:02,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:02,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401349708] [2023-04-01 18:56:02,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401349708] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:02,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556686411] [2023-04-01 18:56:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:02,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:02,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:02,221 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 18:56:02,223 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 18:56:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 18:56:02,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:02,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 18:56:02,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-04-01 18:56:02,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-04-01 18:56:02,600 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 8 [2023-04-01 18:56:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:56:02,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:02,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-04-01 18:56:02,754 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 18:56:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:56:02,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556686411] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:02,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:02,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 8] total 23 [2023-04-01 18:56:02,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364732091] [2023-04-01 18:56:02,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:02,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 18:56:02,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 18:56:02,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-04-01 18:56:02,809 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 9 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 18:56:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:03,444 INFO L93 Difference]: Finished difference Result 95 states and 124 transitions. [2023-04-01 18:56:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 18:56:03,445 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 9 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 41 [2023-04-01 18:56:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:03,446 INFO L225 Difference]: With dead ends: 95 [2023-04-01 18:56:03,446 INFO L226 Difference]: Without dead ends: 93 [2023-04-01 18:56:03,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 18:56:03,447 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 285 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:03,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 222 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:56:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-01 18:56:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2023-04-01 18:56:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:56:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2023-04-01 18:56:03,461 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 41 [2023-04-01 18:56:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:03,461 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2023-04-01 18:56:03,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 9 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 18:56:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2023-04-01 18:56:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 18:56:03,462 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:03,462 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:03,470 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 18:56:03,667 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 18:56:03,668 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:03,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:03,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1202747750, now seen corresponding path program 1 times [2023-04-01 18:56:03,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:03,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856446598] [2023-04-01 18:56:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:03,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:03,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:03,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:03,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:03,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:03,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:56:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:56:03,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:03,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856446598] [2023-04-01 18:56:03,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856446598] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:03,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095338720] [2023-04-01 18:56:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:03,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:03,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:03,942 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 18:56:03,968 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 18:56:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:04,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-01 18:56:04,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:04,169 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 18:56:04,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 18:56:04,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 18:56:04,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:56:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:56:04,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:04,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-04-01 18:56:04,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-04-01 18:56:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:56:04,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095338720] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:04,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:04,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 12] total 32 [2023-04-01 18:56:04,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854671309] [2023-04-01 18:56:04,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:04,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 18:56:04,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:04,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 18:56:04,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2023-04-01 18:56:04,709 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 32 states, 29 states have (on average 2.206896551724138) internal successors, (64), 26 states have internal predecessors, (64), 12 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2023-04-01 18:56:13,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:14,318 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2023-04-01 18:56:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 18:56:14,319 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.206896551724138) internal successors, (64), 26 states have internal predecessors, (64), 12 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) Word has length 41 [2023-04-01 18:56:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:14,322 INFO L225 Difference]: With dead ends: 130 [2023-04-01 18:56:14,322 INFO L226 Difference]: Without dead ends: 128 [2023-04-01 18:56:14,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=548, Invalid=2874, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 18:56:14,323 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 221 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 145 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:14,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 327 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1073 Invalid, 14 Unknown, 0 Unchecked, 8.9s Time] [2023-04-01 18:56:14,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-04-01 18:56:14,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 46. [2023-04-01 18:56:14,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 18:56:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2023-04-01 18:56:14,334 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 41 [2023-04-01 18:56:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:14,335 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2023-04-01 18:56:14,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.206896551724138) internal successors, (64), 26 states have internal predecessors, (64), 12 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2023-04-01 18:56:14,335 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2023-04-01 18:56:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 18:56:14,338 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:14,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:14,344 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 18:56:14,544 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 18:56:14,544 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:14,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:14,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1440329911, now seen corresponding path program 1 times [2023-04-01 18:56:14,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:14,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403702961] [2023-04-01 18:56:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:14,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:14,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:14,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:14,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:14,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:14,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:56:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:14,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 18:56:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:56:14,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:14,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403702961] [2023-04-01 18:56:14,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403702961] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:14,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287918740] [2023-04-01 18:56:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:14,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:14,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:14,865 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 18:56:14,867 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 18:56:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:14,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 18:56:14,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:14,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 18:56:14,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-04-01 18:56:15,019 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 8 [2023-04-01 18:56:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:56:15,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:15,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:15,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-04-01 18:56:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:56:15,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287918740] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:15,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:15,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 17 [2023-04-01 18:56:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737432468] [2023-04-01 18:56:15,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:15,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 18:56:15,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 18:56:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-04-01 18:56:15,146 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 9 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 18:56:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:15,610 INFO L93 Difference]: Finished difference Result 116 states and 153 transitions. [2023-04-01 18:56:15,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 18:56:15,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 9 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 49 [2023-04-01 18:56:15,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:15,611 INFO L225 Difference]: With dead ends: 116 [2023-04-01 18:56:15,611 INFO L226 Difference]: Without dead ends: 114 [2023-04-01 18:56:15,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-04-01 18:56:15,612 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 81 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:15,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 279 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:56:15,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-04-01 18:56:15,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 68. [2023-04-01 18:56:15,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 18:56:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2023-04-01 18:56:15,625 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 49 [2023-04-01 18:56:15,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:15,625 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2023-04-01 18:56:15,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 9 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 18:56:15,626 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2023-04-01 18:56:15,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 18:56:15,626 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:15,626 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:15,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 18:56:15,831 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 18:56:15,834 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:15,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:15,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1049199051, now seen corresponding path program 1 times [2023-04-01 18:56:15,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:15,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042281356] [2023-04-01 18:56:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:15,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:16,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:16,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:16,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:16,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:16,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:56:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:16,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 18:56:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:56:16,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:16,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042281356] [2023-04-01 18:56:16,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042281356] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:16,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260579554] [2023-04-01 18:56:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:16,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:16,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:16,137 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 18:56:16,138 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 18:56:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:16,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-01 18:56:16,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:16,389 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 18:56:16,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 18:56:16,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:56:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:56:16,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:16,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:16,755 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 20 treesize of output 16 [2023-04-01 18:56:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 18:56:16,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260579554] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:16,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:16,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 13] total 34 [2023-04-01 18:56:16,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203540270] [2023-04-01 18:56:16,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:16,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-01 18:56:16,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:16,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-01 18:56:16,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 18:56:16,911 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 34 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 28 states have internal predecessors, (79), 15 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2023-04-01 18:56:23,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:30,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:30,120 INFO L93 Difference]: Finished difference Result 169 states and 216 transitions. [2023-04-01 18:56:30,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 18:56:30,120 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 28 states have internal predecessors, (79), 15 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) Word has length 49 [2023-04-01 18:56:30,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:30,121 INFO L225 Difference]: With dead ends: 169 [2023-04-01 18:56:30,121 INFO L226 Difference]: Without dead ends: 167 [2023-04-01 18:56:30,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=571, Invalid=3211, Unknown=0, NotChecked=0, Total=3782 [2023-04-01 18:56:30,124 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 246 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 179 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:30,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 371 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1430 Invalid, 19 Unknown, 0 Unchecked, 12.5s Time] [2023-04-01 18:56:30,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-04-01 18:56:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 54. [2023-04-01 18:56:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 18:56:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-04-01 18:56:30,134 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 49 [2023-04-01 18:56:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:30,135 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-04-01 18:56:30,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 28 states have internal predecessors, (79), 15 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2023-04-01 18:56:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-04-01 18:56:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 18:56:30,135 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:30,135 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:30,140 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 18:56:30,338 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 18:56:30,338 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:30,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:30,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2092606674, now seen corresponding path program 2 times [2023-04-01 18:56:30,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:30,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694957327] [2023-04-01 18:56:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:30,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:30,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:30,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:30,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:30,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:30,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:56:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:30,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 18:56:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:30,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:56:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 18:56:30,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:30,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694957327] [2023-04-01 18:56:30,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694957327] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:30,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840964267] [2023-04-01 18:56:30,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:56:30,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:30,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:30,574 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:56:30,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:56:30,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:56:30,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:56:30,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 18:56:30,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:30,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 18:56:30,806 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 8 [2023-04-01 18:56:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 18:56:30,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:30,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:30,879 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 18:56:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 18:56:30,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840964267] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:30,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:30,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 21 [2023-04-01 18:56:30,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389705920] [2023-04-01 18:56:30,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:30,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 18:56:30,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:30,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 18:56:30,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-04-01 18:56:30,905 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 21 states, 20 states have (on average 3.15) internal successors, (63), 18 states have internal predecessors, (63), 10 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2023-04-01 18:56:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:31,494 INFO L93 Difference]: Finished difference Result 168 states and 228 transitions. [2023-04-01 18:56:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 18:56:31,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 18 states have internal predecessors, (63), 10 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) Word has length 57 [2023-04-01 18:56:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:31,495 INFO L225 Difference]: With dead ends: 168 [2023-04-01 18:56:31,495 INFO L226 Difference]: Without dead ends: 166 [2023-04-01 18:56:31,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 18:56:31,496 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 125 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:31,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 316 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 18:56:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-04-01 18:56:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 100. [2023-04-01 18:56:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 73 states have internal predecessors, (87), 21 states have call successors, (21), 8 states have call predecessors, (21), 7 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-01 18:56:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2023-04-01 18:56:31,520 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 57 [2023-04-01 18:56:31,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:31,521 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2023-04-01 18:56:31,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 18 states have internal predecessors, (63), 10 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2023-04-01 18:56:31,521 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2023-04-01 18:56:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 18:56:31,526 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:31,526 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:31,533 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 18:56:31,737 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 18:56:31,738 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:31,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:31,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1952058064, now seen corresponding path program 1 times [2023-04-01 18:56:31,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:31,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187622361] [2023-04-01 18:56:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:31,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:56:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 18:56:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:56:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 18:56:31,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:31,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187622361] [2023-04-01 18:56:31,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187622361] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:31,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442644479] [2023-04-01 18:56:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:31,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:31,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:31,980 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 18:56:32,005 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 18:56:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:32,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 18:56:32,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:32,140 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 18:56:32,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:56:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 18:56:32,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:32,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:32,456 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 20 treesize of output 16 [2023-04-01 18:56:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 18:56:32,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442644479] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:32,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:32,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 29 [2023-04-01 18:56:32,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071119764] [2023-04-01 18:56:32,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:32,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 18:56:32,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:32,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 18:56:32,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2023-04-01 18:56:32,526 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 29 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 15 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2023-04-01 18:56:38,634 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 18:56:42,574 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 18:56:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:42,611 INFO L93 Difference]: Finished difference Result 273 states and 368 transitions. [2023-04-01 18:56:42,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-04-01 18:56:42,611 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 15 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) Word has length 57 [2023-04-01 18:56:42,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:42,613 INFO L225 Difference]: With dead ends: 273 [2023-04-01 18:56:42,613 INFO L226 Difference]: Without dead ends: 271 [2023-04-01 18:56:42,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=696, Invalid=3726, Unknown=0, NotChecked=0, Total=4422 [2023-04-01 18:56:42,614 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 277 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 301 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:42,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 609 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1748 Invalid, 11 Unknown, 0 Unchecked, 9.2s Time] [2023-04-01 18:56:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-04-01 18:56:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 62. [2023-04-01 18:56:42,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 45 states have internal predecessors, (49), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 18:56:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-04-01 18:56:42,629 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 57 [2023-04-01 18:56:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:42,629 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-04-01 18:56:42,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 15 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2023-04-01 18:56:42,629 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-04-01 18:56:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 18:56:42,631 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:42,631 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:42,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:42,838 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 18:56:42,838 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:42,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1600172563, now seen corresponding path program 3 times [2023-04-01 18:56:42,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:42,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179766980] [2023-04-01 18:56:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:42,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:43,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:43,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:43,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:43,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:43,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:56:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:43,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 18:56:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:43,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:56:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:43,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 18:56:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 18:56:43,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179766980] [2023-04-01 18:56:43,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179766980] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:43,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469999279] [2023-04-01 18:56:43,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:56:43,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:43,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:43,064 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 18:56:43,066 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 18:56:43,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 18:56:43,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:56:43,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 18:56:43,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 18:56:43,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 18:56:43,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469999279] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:43,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:43,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 28 [2023-04-01 18:56:43,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798732952] [2023-04-01 18:56:43,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:43,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 18:56:43,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:43,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 18:56:43,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2023-04-01 18:56:43,621 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 28 states, 28 states have (on average 3.25) internal successors, (91), 27 states have internal predecessors, (91), 17 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) [2023-04-01 18:56:43,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:43,973 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2023-04-01 18:56:43,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 18:56:43,974 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 27 states have internal predecessors, (91), 17 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) Word has length 65 [2023-04-01 18:56:43,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:43,975 INFO L225 Difference]: With dead ends: 119 [2023-04-01 18:56:43,975 INFO L226 Difference]: Without dead ends: 83 [2023-04-01 18:56:43,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 18:56:43,977 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 149 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:43,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 69 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:56:43,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-04-01 18:56:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2023-04-01 18:56:43,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 53 states have internal predecessors, (60), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 18:56:43,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-04-01 18:56:43,997 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 65 [2023-04-01 18:56:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:43,997 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-04-01 18:56:43,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 27 states have internal predecessors, (91), 17 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) [2023-04-01 18:56:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-04-01 18:56:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 18:56:43,998 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:43,999 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:44,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:44,199 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 18:56:44,199 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:44,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:44,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1188617731, now seen corresponding path program 4 times [2023-04-01 18:56:44,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:44,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639276093] [2023-04-01 18:56:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:44,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:44,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:44,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:44,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:44,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:44,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:56:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:44,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:56:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:44,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 18:56:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:44,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-04-01 18:56:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:44,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-04-01 18:56:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:44,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-04-01 18:56:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:44,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-04-01 18:56:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-01 18:56:44,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:44,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639276093] [2023-04-01 18:56:44,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639276093] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:44,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240414928] [2023-04-01 18:56:44,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:56:44,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:44,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:44,624 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 18:56:44,626 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 18:56:44,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:56:44,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:56:44,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 18:56:44,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:44,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 18:56:44,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-04-01 18:56:45,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-04-01 18:56:45,207 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 16 treesize of output 8 [2023-04-01 18:56:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-01 18:56:45,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:45,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:45,444 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 18:56:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-01 18:56:45,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240414928] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:45,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:45,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 12] total 36 [2023-04-01 18:56:45,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801797651] [2023-04-01 18:56:45,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:45,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 18:56:45,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:45,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 18:56:45,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 18:56:45,533 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 36 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 31 states have internal predecessors, (117), 20 states have call successors, (35), 6 states have call predecessors, (35), 3 states have return successors, (31), 19 states have call predecessors, (31), 19 states have call successors, (31) [2023-04-01 18:56:47,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:47,882 INFO L93 Difference]: Finished difference Result 403 states and 588 transitions. [2023-04-01 18:56:47,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-04-01 18:56:47,883 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 31 states have internal predecessors, (117), 20 states have call successors, (35), 6 states have call predecessors, (35), 3 states have return successors, (31), 19 states have call predecessors, (31), 19 states have call successors, (31) Word has length 85 [2023-04-01 18:56:47,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:47,886 INFO L225 Difference]: With dead ends: 403 [2023-04-01 18:56:47,886 INFO L226 Difference]: Without dead ends: 401 [2023-04-01 18:56:47,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 171 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=948, Invalid=5694, Unknown=0, NotChecked=0, Total=6642 [2023-04-01 18:56:47,889 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 488 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:47,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 749 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 2498 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 18:56:47,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-04-01 18:56:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 117. [2023-04-01 18:56:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-01 18:56:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 148 transitions. [2023-04-01 18:56:47,931 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 148 transitions. Word has length 85 [2023-04-01 18:56:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:47,932 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 148 transitions. [2023-04-01 18:56:47,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 31 states have internal predecessors, (117), 20 states have call successors, (35), 6 states have call predecessors, (35), 3 states have return successors, (31), 19 states have call predecessors, (31), 19 states have call successors, (31) [2023-04-01 18:56:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 148 transitions. [2023-04-01 18:56:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 18:56:47,933 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:47,934 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:47,938 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 18:56:48,134 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 18:56:48,134 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:48,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:48,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2082104069, now seen corresponding path program 1 times [2023-04-01 18:56:48,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:48,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482095440] [2023-04-01 18:56:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:48,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:48,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:48,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:48,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:48,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:48,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:56:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:48,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:56:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:48,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 18:56:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:48,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-04-01 18:56:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:48,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-04-01 18:56:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:48,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-04-01 18:56:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:48,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-04-01 18:56:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-01 18:56:48,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:48,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482095440] [2023-04-01 18:56:48,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482095440] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:48,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638633858] [2023-04-01 18:56:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:48,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:48,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:48,549 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 18:56:48,551 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 18:56:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:48,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 18:56:48,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:48,857 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 18:56:48,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 18:56:49,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 18:56:49,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:56:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 18:56:49,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:49,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:49,566 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 20 treesize of output 16 [2023-04-01 18:56:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-01 18:56:49,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638633858] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:49,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:49,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 16] total 42 [2023-04-01 18:56:49,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803732079] [2023-04-01 18:56:49,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:49,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-01 18:56:49,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:49,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-01 18:56:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1572, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 18:56:49,780 INFO L87 Difference]: Start difference. First operand 117 states and 148 transitions. Second operand has 42 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 36 states have internal predecessors, (121), 22 states have call successors, (35), 6 states have call predecessors, (35), 4 states have return successors, (31), 20 states have call predecessors, (31), 20 states have call successors, (31) [2023-04-01 18:57:07,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:09,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:15,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:28,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:35,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:44,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:46,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:57:46,280 INFO L93 Difference]: Finished difference Result 528 states and 755 transitions. [2023-04-01 18:57:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-04-01 18:57:46,281 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 36 states have internal predecessors, (121), 22 states have call successors, (35), 6 states have call predecessors, (35), 4 states have return successors, (31), 20 states have call predecessors, (31), 20 states have call successors, (31) Word has length 85 [2023-04-01 18:57:46,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:57:46,283 INFO L225 Difference]: With dead ends: 528 [2023-04-01 18:57:46,283 INFO L226 Difference]: Without dead ends: 526 [2023-04-01 18:57:46,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 157 SyntacticMatches, 12 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3531 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1830, Invalid=10380, Unknown=0, NotChecked=0, Total=12210 [2023-04-01 18:57:46,287 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1226 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 3074 mSolverCounterSat, 828 mSolverCounterUnsat, 79 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 3981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 3074 IncrementalHoareTripleChecker+Invalid, 79 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:57:46,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1226 Valid, 946 Invalid, 3981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [828 Valid, 3074 Invalid, 79 Unknown, 0 Unchecked, 54.0s Time] [2023-04-01 18:57:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-04-01 18:57:46,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 109. [2023-04-01 18:57:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 79 states have internal predecessors, (95), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-01 18:57:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2023-04-01 18:57:46,320 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 85 [2023-04-01 18:57:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:57:46,320 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2023-04-01 18:57:46,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 36 states have internal predecessors, (121), 22 states have call successors, (35), 6 states have call predecessors, (35), 4 states have return successors, (31), 20 states have call predecessors, (31), 20 states have call successors, (31) [2023-04-01 18:57:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2023-04-01 18:57:46,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-01 18:57:46,321 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:57:46,322 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:57:46,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 18:57:46,522 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 18:57:46,522 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:57:46,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:57:46,523 INFO L85 PathProgramCache]: Analyzing trace with hash -45969432, now seen corresponding path program 5 times [2023-04-01 18:57:46,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:57:46,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295729286] [2023-04-01 18:57:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:57:46,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:57:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:46,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:57:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:46,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:57:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:46,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:57:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:46,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:57:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:46,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:57:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:46,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:57:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:46,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 18:57:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:46,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-04-01 18:57:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:46,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-04-01 18:57:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:46,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-04-01 18:57:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:46,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-04-01 18:57:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:46,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-04-01 18:57:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 18:57:46,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:57:46,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295729286] [2023-04-01 18:57:46,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295729286] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:57:46,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872563041] [2023-04-01 18:57:46,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:57:46,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:46,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:57:46,857 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 18:57:46,879 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 18:57:46,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-04-01 18:57:46,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:57:46,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 18:57:46,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:57:47,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:57:47,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-04-01 18:57:47,251 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 8 [2023-04-01 18:57:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 18:57:47,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:57:47,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:57:47,351 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 18:57:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 18:57:47,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872563041] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:57:47,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:57:47,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 13] total 28 [2023-04-01 18:57:47,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877601287] [2023-04-01 18:57:47,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:57:47,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 18:57:47,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:57:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 18:57:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2023-04-01 18:57:47,397 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 18 states have call successors, (29), 4 states have call predecessors, (29), 2 states have return successors, (25), 17 states have call predecessors, (25), 17 states have call successors, (25) [2023-04-01 18:57:50,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:57:50,199 INFO L93 Difference]: Finished difference Result 714 states and 1072 transitions. [2023-04-01 18:57:50,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-04-01 18:57:50,200 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 18 states have call successors, (29), 4 states have call predecessors, (29), 2 states have return successors, (25), 17 states have call predecessors, (25), 17 states have call successors, (25) Word has length 93 [2023-04-01 18:57:50,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:57:50,202 INFO L225 Difference]: With dead ends: 714 [2023-04-01 18:57:50,202 INFO L226 Difference]: Without dead ends: 712 [2023-04-01 18:57:50,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 197 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2940 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1029, Invalid=7901, Unknown=0, NotChecked=0, Total=8930 [2023-04-01 18:57:50,204 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 231 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 4222 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 4554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 4222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 18:57:50,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1454 Invalid, 4554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 4222 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 18:57:50,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2023-04-01 18:57:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 220. [2023-04-01 18:57:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 159 states have (on average 1.2641509433962264) internal successors, (201), 162 states have internal predecessors, (201), 49 states have call successors, (49), 12 states have call predecessors, (49), 11 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2023-04-01 18:57:50,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 298 transitions. [2023-04-01 18:57:50,268 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 298 transitions. Word has length 93 [2023-04-01 18:57:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:57:50,268 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 298 transitions. [2023-04-01 18:57:50,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 18 states have call successors, (29), 4 states have call predecessors, (29), 2 states have return successors, (25), 17 states have call predecessors, (25), 17 states have call successors, (25) [2023-04-01 18:57:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 298 transitions. [2023-04-01 18:57:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-01 18:57:50,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:57:50,269 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:57:50,274 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 18:57:50,473 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 18:57:50,474 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:57:50,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:57:50,474 INFO L85 PathProgramCache]: Analyzing trace with hash -399057814, now seen corresponding path program 1 times [2023-04-01 18:57:50,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:57:50,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143527602] [2023-04-01 18:57:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:57:50,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:57:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:57:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:57:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:57:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:57:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:57:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:57:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 18:57:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-04-01 18:57:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-04-01 18:57:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-04-01 18:57:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-04-01 18:57:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-04-01 18:57:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 18:57:50,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:57:50,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143527602] [2023-04-01 18:57:50,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143527602] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:57:50,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309368593] [2023-04-01 18:57:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:57:50,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:50,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:57:50,794 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 18:57:50,824 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 18:57:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:50,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 18:57:50,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:57:51,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:57:51,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 18:57:51,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:57:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-04-01 18:57:51,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:57:51,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:57:51,833 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 20 treesize of output 16 [2023-04-01 18:57:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 18:57:52,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309368593] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:57:52,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:57:52,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 17] total 46 [2023-04-01 18:57:52,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620794082] [2023-04-01 18:57:52,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:57:52,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-01 18:57:52,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:57:52,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-01 18:57:52,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 18:57:52,075 INFO L87 Difference]: Start difference. First operand 220 states and 298 transitions. Second operand has 46 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 40 states have internal predecessors, (130), 26 states have call successors, (38), 6 states have call predecessors, (38), 4 states have return successors, (34), 24 states have call predecessors, (34), 24 states have call successors, (34) [2023-04-01 18:57:56,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:12,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:42,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:45,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:01,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:02,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:02,862 INFO L93 Difference]: Finished difference Result 1124 states and 1675 transitions. [2023-04-01 18:59:02,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-04-01 18:59:02,863 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 40 states have internal predecessors, (130), 26 states have call successors, (38), 6 states have call predecessors, (38), 4 states have return successors, (34), 24 states have call predecessors, (34), 24 states have call successors, (34) Word has length 93 [2023-04-01 18:59:02,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:02,866 INFO L225 Difference]: With dead ends: 1124 [2023-04-01 18:59:02,867 INFO L226 Difference]: Without dead ends: 1122 [2023-04-01 18:59:02,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 174 SyntacticMatches, 10 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9119 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4192, Invalid=23198, Unknown=0, NotChecked=0, Total=27390 [2023-04-01 18:59:02,871 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1197 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 4717 mSolverCounterSat, 1173 mSolverCounterUnsat, 88 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 5978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 4717 IncrementalHoareTripleChecker+Invalid, 88 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.7s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:02,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1197 Valid, 1411 Invalid, 5978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1173 Valid, 4717 Invalid, 88 Unknown, 0 Unchecked, 65.7s Time] [2023-04-01 18:59:02,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2023-04-01 18:59:02,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 192. [2023-04-01 18:59:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 138 states have (on average 1.3043478260869565) internal successors, (180), 139 states have internal predecessors, (180), 41 states have call successors, (41), 13 states have call predecessors, (41), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-04-01 18:59:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 261 transitions. [2023-04-01 18:59:02,945 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 261 transitions. Word has length 93 [2023-04-01 18:59:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:02,945 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 261 transitions. [2023-04-01 18:59:02,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 40 states have internal predecessors, (130), 26 states have call successors, (38), 6 states have call predecessors, (38), 4 states have return successors, (34), 24 states have call predecessors, (34), 24 states have call successors, (34) [2023-04-01 18:59:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 261 transitions. [2023-04-01 18:59:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-01 18:59:02,946 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:02,946 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:02,955 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 18:59:03,150 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 18:59:03,151 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:03,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:03,151 INFO L85 PathProgramCache]: Analyzing trace with hash 748850381, now seen corresponding path program 6 times [2023-04-01 18:59:03,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:03,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895503875] [2023-04-01 18:59:03,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:03,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:59:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:59:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 18:59:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:59:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 18:59:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-04-01 18:59:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-04-01 18:59:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-04-01 18:59:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-04-01 18:59:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-04-01 18:59:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-04-01 18:59:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 10 proven. 63 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-01 18:59:03,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:03,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895503875] [2023-04-01 18:59:03,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895503875] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:03,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637927744] [2023-04-01 18:59:03,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:59:03,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:03,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:03,481 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 18:59:03,486 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 18:59:03,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-04-01 18:59:03,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:59:03,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 18:59:03,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:03,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 18:59:44,200 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 20 treesize of output 8 [2023-04-01 18:59:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-01 18:59:44,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:44,303 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 18 treesize of output 16 [2023-04-01 18:59:44,305 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 22 treesize of output 18 [2023-04-01 18:59:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 10 proven. 63 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-01 18:59:44,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637927744] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:44,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:44,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 32 [2023-04-01 18:59:44,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269152039] [2023-04-01 18:59:44,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:44,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 18:59:44,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:44,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 18:59:44,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=871, Unknown=4, NotChecked=0, Total=992 [2023-04-01 18:59:44,366 INFO L87 Difference]: Start difference. First operand 192 states and 261 transitions. Second operand has 32 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 29 states have internal predecessors, (101), 19 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (26), 17 states have call predecessors, (26), 17 states have call successors, (26) [2023-04-01 18:59:46,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:48,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:56,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:58,605 WARN L539 Checker$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 19:00:04,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:06,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:08,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:10,709 WARN L539 Checker$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 19:00:18,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:20,759 WARN L539 Checker$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 19:00:30,798 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]