/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/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:21:03,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:21:03,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:21:03,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 01:21:03,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 01:21:03,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 01:21:03,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 01:21:03,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 01:21:03,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 01:21:03,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 01:21:03,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 01:21:03,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 01:21:03,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:21:03,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:21:03,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:21:03,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:21:03,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:21:03,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:21:03,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:21:03,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:21:03,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:21:03,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:21:03,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:21:03,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:21:03,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 01:21:03,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 01:21:03,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 01:21:03,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 01:21:03,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 01:21:03,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 01:21:03,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 01:21:03,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 01:21:03,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 01:21:03,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 01:21:03,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 01:21:03,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 01:21:03,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 01:21:03,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 01:21:03,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:21:03,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:21:03,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:21:03,409 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 [2023-04-02 01:21:03,428 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:21:03,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:21:03,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:21:03,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:21:03,428 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:21:03,429 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:21:03,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:21:03,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:21:03,429 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:21:03,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:21:03,430 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:21:03,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:21:03,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:21:03,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:21:03,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:21:03,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:21:03,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:21:03,431 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:21:03,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:21:03,431 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:21:03,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:21:03,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:21:03,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:21:03,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:21:03,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:21:03,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:21:03,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:21:03,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:21:03,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:21:03,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:21:03,432 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:21:03,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:21:03,432 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:21:03,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:21:03,433 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:21:03,433 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:21:03,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:21:03,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:21:03,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:21:03,654 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:21:03,655 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:21:03,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_3-2.i [2023-04-02 01:21:04,615 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:21:04,757 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:21:04,757 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_3-2.i [2023-04-02 01:21:04,762 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/041fe248e/02e39edd79db4b2ca8377f27975a8154/FLAGa90cff76d [2023-04-02 01:21:04,774 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/041fe248e/02e39edd79db4b2ca8377f27975a8154 [2023-04-02 01:21:04,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:21:04,777 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:21:04,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:21:04,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:21:04,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:21:04,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:21:04" (1/1) ... [2023-04-02 01:21:04,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40cc1443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:21:04, skipping insertion in model container [2023-04-02 01:21:04,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:21:04" (1/1) ... [2023-04-02 01:21:04,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:21:04,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:21:04,886 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/loop-acceleration/array_3-2.i[809,822] [2023-04-02 01:21:04,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:21:04,904 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:21:04,911 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/loop-acceleration/array_3-2.i[809,822] [2023-04-02 01:21:04,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:21:04,925 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:21:04,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:21:04 WrapperNode [2023-04-02 01:21:04,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:21:04,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:21:04,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:21:04,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:21:04,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:21:04" (1/1) ... [2023-04-02 01:21:04,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:21:04" (1/1) ... [2023-04-02 01:21:04,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:21:04" (1/1) ... [2023-04-02 01:21:04,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:21:04" (1/1) ... [2023-04-02 01:21:04,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:21:04" (1/1) ... [2023-04-02 01:21:04,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:21:04" (1/1) ... [2023-04-02 01:21:04,944 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:21:04" (1/1) ... [2023-04-02 01:21:04,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:21:04" (1/1) ... [2023-04-02 01:21:04,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:21:04,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:21:04,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:21:04,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:21:04,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:21:04" (1/1) ... [2023-04-02 01:21:04,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:21:04,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:21:04,974 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) [2023-04-02 01:21:04,980 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 [2023-04-02 01:21:04,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:21:04,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:21:04,998 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:21:04,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:21:04,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:21:04,998 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:21:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:21:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 01:21:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 01:21:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:21:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:21:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:21:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 01:21:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:21:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 01:21:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:21:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:21:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:21:05,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:21:05,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:21:05,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:21:05,060 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:21:05,061 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:21:05,181 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:21:05,185 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:21:05,185 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 01:21:05,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:21:05 BoogieIcfgContainer [2023-04-02 01:21:05,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:21:05,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:21:05,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:21:05,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:21:05,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:21:04" (1/3) ... [2023-04-02 01:21:05,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6f4232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:21:05, skipping insertion in model container [2023-04-02 01:21:05,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:21:04" (2/3) ... [2023-04-02 01:21:05,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6f4232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:21:05, skipping insertion in model container [2023-04-02 01:21:05,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:21:05" (3/3) ... [2023-04-02 01:21:05,206 INFO L112 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2023-04-02 01:21:05,234 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:21:05,234 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:21:05,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:21:05,286 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;@64300496, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:21:05,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:21:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:21:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 01:21:05,295 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:21:05,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:21:05,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:21:05,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:21:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1368365270, now seen corresponding path program 1 times [2023-04-02 01:21:05,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:21:05,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689643350] [2023-04-02 01:21:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:21:05,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:21:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:05,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:21:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:21:05,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:21:05,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689643350] [2023-04-02 01:21:05,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689643350] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:21:05,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:21:05,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 01:21:05,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099399974] [2023-04-02 01:21:05,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:21:05,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 01:21:05,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:21:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 01:21:05,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 01:21:05,499 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:05,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:21:05,562 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-04-02 01:21:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 01:21:05,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-02 01:21:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:21:05,568 INFO L225 Difference]: With dead ends: 42 [2023-04-02 01:21:05,568 INFO L226 Difference]: Without dead ends: 18 [2023-04-02 01:21:05,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 01:21:05,572 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:21:05,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:21:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-02 01:21:05,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-02 01:21:05,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-02 01:21:05,597 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2023-04-02 01:21:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:21:05,597 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-02 01:21:05,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-02 01:21:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 01:21:05,598 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:21:05,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:21:05,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:21:05,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:21:05,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:21:05,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1606867655, now seen corresponding path program 1 times [2023-04-02 01:21:05,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:21:05,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669210944] [2023-04-02 01:21:05,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:21:05,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:21:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:05,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:21:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:21:05,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:21:05,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669210944] [2023-04-02 01:21:05,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669210944] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:21:05,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:21:05,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:21:05,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008243567] [2023-04-02 01:21:05,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:21:05,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:21:05,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:21:05,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:21:05,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:21:05,684 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:05,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:21:05,744 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-04-02 01:21:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 01:21:05,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 01:21:05,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:21:05,747 INFO L225 Difference]: With dead ends: 35 [2023-04-02 01:21:05,748 INFO L226 Difference]: Without dead ends: 25 [2023-04-02 01:21:05,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:21:05,751 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:21:05,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:21:05,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-02 01:21:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2023-04-02 01:21:05,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-04-02 01:21:05,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2023-04-02 01:21:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:21:05,757 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-04-02 01:21:05,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-04-02 01:21:05,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 01:21:05,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:21:05,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:21:05,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:21:05,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:21:05,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:21:05,759 INFO L85 PathProgramCache]: Analyzing trace with hash 41653477, now seen corresponding path program 1 times [2023-04-02 01:21:05,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:21:05,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113167400] [2023-04-02 01:21:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:21:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:21:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:05,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:21:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:21:05,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:21:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113167400] [2023-04-02 01:21:05,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113167400] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:21:05,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116574381] [2023-04-02 01:21:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:21:05,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:21:05,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:21:05,837 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) [2023-04-02 01:21:05,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 01:21:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:05,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 01:21:05,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:21:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:21:05,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:21:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:21:05,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116574381] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:21:05,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:21:05,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-02 01:21:05,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153302872] [2023-04-02 01:21:05,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:21:05,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:21:05,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:21:05,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:21:05,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:21:05,964 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:21:06,087 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2023-04-02 01:21:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 01:21:06,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-02 01:21:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:21:06,090 INFO L225 Difference]: With dead ends: 55 [2023-04-02 01:21:06,090 INFO L226 Difference]: Without dead ends: 45 [2023-04-02 01:21:06,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:21:06,093 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:21:06,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 22 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:21:06,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-02 01:21:06,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 25. [2023-04-02 01:21:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-02 01:21:06,107 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2023-04-02 01:21:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:21:06,107 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-02 01:21:06,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-02 01:21:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 01:21:06,110 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:21:06,110 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:21:06,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 01:21:06,315 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 [2023-04-02 01:21:06,316 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:21:06,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:21:06,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2014635583, now seen corresponding path program 2 times [2023-04-02 01:21:06,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:21:06,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456962630] [2023-04-02 01:21:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:21:06,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:21:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:06,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:21:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 01:21:06,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:21:06,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456962630] [2023-04-02 01:21:06,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456962630] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:21:06,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:21:06,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 01:21:06,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591948517] [2023-04-02 01:21:06,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:21:06,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:21:06,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:21:06,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:21:06,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:21:06,459 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:21:06,517 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2023-04-02 01:21:06,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:21:06,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-04-02 01:21:06,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:21:06,518 INFO L225 Difference]: With dead ends: 34 [2023-04-02 01:21:06,519 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 01:21:06,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:21:06,520 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:21:06,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 22 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:21:06,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 01:21:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-04-02 01:21:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-04-02 01:21:06,539 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2023-04-02 01:21:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:21:06,539 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-04-02 01:21:06,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-04-02 01:21:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 01:21:06,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:21:06,540 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:21:06,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 01:21:06,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:21:06,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:21:06,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2009539386, now seen corresponding path program 1 times [2023-04-02 01:21:06,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:21:06,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342516467] [2023-04-02 01:21:06,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:21:06,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:21:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:06,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:21:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 01:21:06,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:21:06,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342516467] [2023-04-02 01:21:06,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342516467] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:21:06,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075334314] [2023-04-02 01:21:06,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:21:06,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:21:06,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:21:06,700 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) [2023-04-02 01:21:06,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 01:21:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:06,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 01:21:06,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:21:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 01:21:06,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:21:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 01:21:06,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075334314] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:21:06,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:21:06,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-04-02 01:21:06,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146129902] [2023-04-02 01:21:06,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:21:06,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 01:21:06,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:21:06,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 01:21:06,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:21:06,888 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:07,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:21:07,167 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2023-04-02 01:21:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 01:21:07,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-02 01:21:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:21:07,169 INFO L225 Difference]: With dead ends: 101 [2023-04-02 01:21:07,169 INFO L226 Difference]: Without dead ends: 82 [2023-04-02 01:21:07,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2023-04-02 01:21:07,170 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 184 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:21:07,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 32 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:21:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-04-02 01:21:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2023-04-02 01:21:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2023-04-02 01:21:07,177 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 27 [2023-04-02 01:21:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:21:07,177 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2023-04-02 01:21:07,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2023-04-02 01:21:07,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 01:21:07,179 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:21:07,179 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:21:07,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 01:21:07,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:21:07,391 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:21:07,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:21:07,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1856331354, now seen corresponding path program 2 times [2023-04-02 01:21:07,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:21:07,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548938129] [2023-04-02 01:21:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:21:07,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:21:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:07,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:21:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 01:21:07,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:21:07,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548938129] [2023-04-02 01:21:07,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548938129] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:21:07,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074306073] [2023-04-02 01:21:07,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:21:07,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:21:07,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:21:07,575 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) [2023-04-02 01:21:07,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 01:21:07,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:21:07,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:21:07,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 01:21:07,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:21:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 01:21:07,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:21:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 01:21:07,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074306073] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:21:07,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:21:07,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-02 01:21:07,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193926928] [2023-04-02 01:21:07,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:21:07,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 01:21:07,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:21:07,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 01:21:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-02 01:21:07,857 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:21:08,358 INFO L93 Difference]: Finished difference Result 195 states and 254 transitions. [2023-04-02 01:21:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 01:21:08,359 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-02 01:21:08,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:21:08,361 INFO L225 Difference]: With dead ends: 195 [2023-04-02 01:21:08,362 INFO L226 Difference]: Without dead ends: 166 [2023-04-02 01:21:08,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-02 01:21:08,363 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 447 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:21:08,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 32 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:21:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-04-02 01:21:08,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 80. [2023-04-02 01:21:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 75 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:08,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2023-04-02 01:21:08,382 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 55 [2023-04-02 01:21:08,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:21:08,382 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2023-04-02 01:21:08,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2023-04-02 01:21:08,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-02 01:21:08,383 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:21:08,384 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:21:08,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 01:21:08,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:21:08,591 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:21:08,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:21:08,591 INFO L85 PathProgramCache]: Analyzing trace with hash -194899774, now seen corresponding path program 3 times [2023-04-02 01:21:08,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:21:08,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692857946] [2023-04-02 01:21:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:21:08,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:21:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:09,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:21:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 01:21:09,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:21:09,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692857946] [2023-04-02 01:21:09,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692857946] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:21:09,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179616574] [2023-04-02 01:21:09,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:21:09,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:21:09,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:21:09,055 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) [2023-04-02 01:21:09,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 01:21:09,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 01:21:09,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:21:09,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 01:21:09,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:21:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-02 01:21:09,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:21:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-02 01:21:09,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179616574] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:21:09,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:21:09,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 10] total 37 [2023-04-02 01:21:09,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619591601] [2023-04-02 01:21:09,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:21:09,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-02 01:21:09,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:21:09,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-02 01:21:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=824, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 01:21:09,363 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 34 states have internal predecessors, (114), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:21:10,132 INFO L93 Difference]: Finished difference Result 247 states and 315 transitions. [2023-04-02 01:21:10,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-02 01:21:10,132 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 34 states have internal predecessors, (114), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2023-04-02 01:21:10,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:21:10,133 INFO L225 Difference]: With dead ends: 247 [2023-04-02 01:21:10,133 INFO L226 Difference]: Without dead ends: 192 [2023-04-02 01:21:10,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1450, Invalid=3106, Unknown=0, NotChecked=0, Total=4556 [2023-04-02 01:21:10,135 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 498 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:21:10,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 42 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:21:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-04-02 01:21:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2023-04-02 01:21:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.172972972972973) internal successors, (217), 185 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 221 transitions. [2023-04-02 01:21:10,154 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 221 transitions. Word has length 79 [2023-04-02 01:21:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:21:10,154 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 221 transitions. [2023-04-02 01:21:10,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 34 states have internal predecessors, (114), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 221 transitions. [2023-04-02 01:21:10,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-04-02 01:21:10,156 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:21:10,156 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:21:10,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 01:21:10,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:21:10,361 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:21:10,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:21:10,361 INFO L85 PathProgramCache]: Analyzing trace with hash -913621092, now seen corresponding path program 4 times [2023-04-02 01:21:10,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:21:10,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050018934] [2023-04-02 01:21:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:21:10,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:21:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:11,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:21:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-04-02 01:21:11,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:21:11,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050018934] [2023-04-02 01:21:11,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050018934] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:21:11,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814041342] [2023-04-02 01:21:11,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:21:11,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:21:11,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:21:11,291 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) [2023-04-02 01:21:11,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 01:21:11,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:21:11,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:21:11,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-02 01:21:11,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:21:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-04-02 01:21:11,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:21:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-04-02 01:21:12,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814041342] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:21:12,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:21:12,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2023-04-02 01:21:12,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398086629] [2023-04-02 01:21:12,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:21:12,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-04-02 01:21:12,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:21:12,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-04-02 01:21:12,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2023-04-02 01:21:12,493 INFO L87 Difference]: Start difference. First operand 190 states and 221 transitions. Second operand has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:21:14,562 INFO L93 Difference]: Finished difference Result 533 states and 687 transitions. [2023-04-02 01:21:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-04-02 01:21:14,563 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2023-04-02 01:21:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:21:14,564 INFO L225 Difference]: With dead ends: 533 [2023-04-02 01:21:14,564 INFO L226 Difference]: Without dead ends: 408 [2023-04-02 01:21:14,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5736, Invalid=9516, Unknown=0, NotChecked=0, Total=15252 [2023-04-02 01:21:14,569 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1499 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:21:14,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1499 Valid, 22 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 01:21:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-04-02 01:21:14,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 252. [2023-04-02 01:21:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.1295546558704452) internal successors, (279), 247 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2023-04-02 01:21:14,584 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 189 [2023-04-02 01:21:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:21:14,584 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2023-04-02 01:21:14,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:21:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2023-04-02 01:21:14,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-04-02 01:21:14,586 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:21:14,586 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:21:14,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 01:21:14,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:21:14,811 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:21:14,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:21:14,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2106247618, now seen corresponding path program 5 times [2023-04-02 01:21:14,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:21:14,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264439575] [2023-04-02 01:21:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:21:14,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:21:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:17,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:21:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:21:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5311 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-04-02 01:21:17,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:21:17,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264439575] [2023-04-02 01:21:17,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264439575] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:21:17,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998313809] [2023-04-02 01:21:17,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:21:17,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:21:17,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:21:17,228 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) [2023-04-02 01:21:17,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 01:23:30,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2023-04-02 01:23:30,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:23:30,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 62 conjunts are in the unsatisfiable core [2023-04-02 01:23:30,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:23:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5311 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-04-02 01:23:30,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:23:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5311 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-04-02 01:23:34,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998313809] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:23:34,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:23:34,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2023-04-02 01:23:34,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171753755] [2023-04-02 01:23:34,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:23:34,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2023-04-02 01:23:34,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:23:34,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2023-04-02 01:23:34,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2023-04-02 01:23:34,148 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:23:43,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:23:43,037 INFO L93 Difference]: Finished difference Result 967 states and 1276 transitions. [2023-04-02 01:23:43,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-04-02 01:23:43,037 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2023-04-02 01:23:43,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:23:43,040 INFO L225 Difference]: With dead ends: 967 [2023-04-02 01:23:43,040 INFO L226 Difference]: Without dead ends: 842 [2023-04-02 01:23:43,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9571 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=23003, Invalid=38253, Unknown=0, NotChecked=0, Total=61256 [2023-04-02 01:23:43,046 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3051 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3051 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:23:43,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3051 Valid, 32 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 01:23:43,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2023-04-02 01:23:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 376. [2023-04-02 01:23:43,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.0862533692722371) internal successors, (403), 371 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:23:43,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2023-04-02 01:23:43,070 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 251 [2023-04-02 01:23:43,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:23:43,071 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2023-04-02 01:23:43,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:23:43,071 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2023-04-02 01:23:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-04-02 01:23:43,074 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:23:43,074 INFO L195 NwaCegarLoop]: trace histogram [122, 122, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:23:43,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 01:23:43,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:23:43,285 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:23:43,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:23:43,286 INFO L85 PathProgramCache]: Analyzing trace with hash 51172610, now seen corresponding path program 6 times [2023-04-02 01:23:43,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:23:43,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853838933] [2023-04-02 01:23:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:23:43,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:23:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:23:50,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:23:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:23:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16595 backedges. 0 proven. 14884 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-04-02 01:23:50,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:23:50,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853838933] [2023-04-02 01:23:50,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853838933] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:23:50,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151445339] [2023-04-02 01:23:50,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:23:50,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:23:50,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:23:50,858 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) [2023-04-02 01:23:50,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process