/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/bitvector/soft_float_4-2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:12:02,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:12:02,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:12:02,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 20:12:02,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 20:12:02,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 20:12:02,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 20:12:02,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 20:12:02,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 20:12:02,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 20:12:02,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 20:12:02,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 20:12:02,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 20:12:02,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 20:12:02,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 20:12:02,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 20:12:02,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 20:12:02,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 20:12:02,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 20:12:02,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 20:12:02,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 20:12:02,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 20:12:02,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 20:12:02,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 20:12:02,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 20:12:02,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 20:12:02,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 20:12:02,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 20:12:02,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 20:12:02,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 20:12:02,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 20:12:02,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 20:12:02,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 20:12:02,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 20:12:02,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 20:12:02,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 20:12:02,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 20:12:02,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 20:12:02,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:12:02,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:12:02,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:12:02,398 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 20:12:02,430 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:12:02,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:12:02,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:12:02,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:12:02,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:12:02,431 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:12:02,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:12:02,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:12:02,431 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:12:02,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:12:02,432 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:12:02,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:12:02,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:12:02,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:12:02,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:12:02,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:12:02,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:12:02,434 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:12:02,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:12:02,435 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:12:02,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:12:02,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:12:02,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:12:02,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:12:02,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:12:02,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:12:02,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:12:02,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:12:02,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:12:02,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:12:02,437 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:12:02,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:12:02,437 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:12:02,437 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:12:02,437 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:12:02,437 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:12:02,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:12:02,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:12:02,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:12:02,692 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:12:02,692 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:12:02,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-04-01 20:12:03,799 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:12:03,951 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:12:03,951 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-04-01 20:12:03,958 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/312aaea4d/b365abd4194b4ae1a361daed36a7f6bb/FLAGcc8365cea [2023-04-01 20:12:03,972 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/312aaea4d/b365abd4194b4ae1a361daed36a7f6bb [2023-04-01 20:12:03,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:12:03,974 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:12:03,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:12:03,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:12:03,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:12:03,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:12:03" (1/1) ... [2023-04-01 20:12:03,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4040c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:12:03, skipping insertion in model container [2023-04-01 20:12:03,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:12:03" (1/1) ... [2023-04-01 20:12:03,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:12:04,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:12:04,157 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/bitvector/soft_float_4-2a.c.cil.c[755,768] [2023-04-01 20:12:04,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:12:04,230 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:12:04,241 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/bitvector/soft_float_4-2a.c.cil.c[755,768] [2023-04-01 20:12:04,287 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:12:04,297 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:12:04,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:12:04 WrapperNode [2023-04-01 20:12:04,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:12:04,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:12:04,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:12:04,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:12:04,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:12:04" (1/1) ... [2023-04-01 20:12:04,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:12:04" (1/1) ... [2023-04-01 20:12:04,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:12:04" (1/1) ... [2023-04-01 20:12:04,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:12:04" (1/1) ... [2023-04-01 20:12:04,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:12:04" (1/1) ... [2023-04-01 20:12:04,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:12:04" (1/1) ... [2023-04-01 20:12:04,326 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:12:04" (1/1) ... [2023-04-01 20:12:04,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:12:04" (1/1) ... [2023-04-01 20:12:04,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:12:04,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:12:04,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:12:04,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:12:04,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:12:04" (1/1) ... [2023-04-01 20:12:04,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:12:04,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:04,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 20:12:04,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 20:12:04,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:12:04,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:12:04,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:12:04,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 20:12:04,404 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-04-01 20:12:04,404 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-04-01 20:12:04,405 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2023-04-01 20:12:04,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:12:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:12:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:12:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:12:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:12:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 20:12:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 20:12:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 20:12:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-04-01 20:12:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-04-01 20:12:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2023-04-01 20:12:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:12:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:12:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:12:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:12:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:12:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:12:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:12:04,469 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:12:04,471 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:12:04,855 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:12:04,862 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:12:04,862 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 20:12:04,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:12:04 BoogieIcfgContainer [2023-04-01 20:12:04,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:12:04,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:12:04,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:12:04,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:12:04,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:12:03" (1/3) ... [2023-04-01 20:12:04,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bec7194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:12:04, skipping insertion in model container [2023-04-01 20:12:04,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:12:04" (2/3) ... [2023-04-01 20:12:04,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bec7194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:12:04, skipping insertion in model container [2023-04-01 20:12:04,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:12:04" (3/3) ... [2023-04-01 20:12:04,871 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2023-04-01 20:12:04,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:12:04,902 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:12:04,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:12:04,948 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;@535cbde8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:12:04,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:12:04,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 70 states have (on average 1.5571428571428572) internal successors, (109), 71 states have internal predecessors, (109), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 20:12:04,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 20:12:04,960 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:04,960 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:04,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:04,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:04,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1744918474, now seen corresponding path program 1 times [2023-04-01 20:12:04,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:04,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464967876] [2023-04-01 20:12:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:04,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:05,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:05,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:05,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:05,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:12:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:12:05,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:05,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464967876] [2023-04-01 20:12:05,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464967876] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092077511] [2023-04-01 20:12:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:05,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:05,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:05,562 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:05,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 20:12:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:05,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 20:12:05,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:05,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:12:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:12:05,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092077511] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:12:05,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:12:05,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 19 [2023-04-01 20:12:05,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944397492] [2023-04-01 20:12:05,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:12:05,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 20:12:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:05,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 20:12:05,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2023-04-01 20:12:05,971 INFO L87 Difference]: Start difference. First operand has 89 states, 70 states have (on average 1.5571428571428572) internal successors, (109), 71 states have internal predecessors, (109), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:12:07,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:07,151 INFO L93 Difference]: Finished difference Result 201 states and 316 transitions. [2023-04-01 20:12:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 20:12:07,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 39 [2023-04-01 20:12:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:07,161 INFO L225 Difference]: With dead ends: 201 [2023-04-01 20:12:07,161 INFO L226 Difference]: Without dead ends: 124 [2023-04-01 20:12:07,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 20:12:07,173 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 200 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:07,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 88 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 20:12:07,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-04-01 20:12:07,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 89. [2023-04-01 20:12:07,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 71 states have internal predecessors, (95), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2023-04-01 20:12:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2023-04-01 20:12:07,244 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 39 [2023-04-01 20:12:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:07,244 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2023-04-01 20:12:07,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:12:07,246 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2023-04-01 20:12:07,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 20:12:07,249 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:07,249 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:07,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:07,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 20:12:07,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:07,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:07,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1426174427, now seen corresponding path program 1 times [2023-04-01 20:12:07,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:07,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449568237] [2023-04-01 20:12:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:07,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:07,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:07,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:07,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:07,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:12:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:12:07,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:07,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449568237] [2023-04-01 20:12:07,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449568237] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:12:07,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:12:07,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 20:12:07,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237830817] [2023-04-01 20:12:07,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:12:07,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 20:12:07,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:07,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 20:12:07,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:12:07,612 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:12:08,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:08,028 INFO L93 Difference]: Finished difference Result 156 states and 212 transitions. [2023-04-01 20:12:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 20:12:08,029 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-04-01 20:12:08,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:08,031 INFO L225 Difference]: With dead ends: 156 [2023-04-01 20:12:08,031 INFO L226 Difference]: Without dead ends: 112 [2023-04-01 20:12:08,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:12:08,032 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 120 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:08,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 37 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:12:08,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-04-01 20:12:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 97. [2023-04-01 20:12:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 77 states have internal predecessors, (101), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-04-01 20:12:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 131 transitions. [2023-04-01 20:12:08,047 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 131 transitions. Word has length 43 [2023-04-01 20:12:08,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:08,047 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 131 transitions. [2023-04-01 20:12:08,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:12:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 131 transitions. [2023-04-01 20:12:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 20:12:08,049 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:08,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:08,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:12:08,050 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:08,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:08,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1631157427, now seen corresponding path program 1 times [2023-04-01 20:12:08,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:08,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731461289] [2023-04-01 20:12:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:08,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:08,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:08,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:08,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:08,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:12:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:08,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 20:12:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:12:08,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:08,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731461289] [2023-04-01 20:12:08,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731461289] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:12:08,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:12:08,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 20:12:08,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155344500] [2023-04-01 20:12:08,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:12:08,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 20:12:08,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:08,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 20:12:08,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:12:08,222 INFO L87 Difference]: Start difference. First operand 97 states and 131 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:12:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:08,727 INFO L93 Difference]: Finished difference Result 170 states and 234 transitions. [2023-04-01 20:12:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:12:08,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2023-04-01 20:12:08,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:08,731 INFO L225 Difference]: With dead ends: 170 [2023-04-01 20:12:08,731 INFO L226 Difference]: Without dead ends: 135 [2023-04-01 20:12:08,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-04-01 20:12:08,733 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 212 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:08,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 42 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 20:12:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-04-01 20:12:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 127. [2023-04-01 20:12:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 101 states have (on average 1.3762376237623761) internal successors, (139), 103 states have internal predecessors, (139), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2023-04-01 20:12:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2023-04-01 20:12:08,762 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 47 [2023-04-01 20:12:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:08,763 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2023-04-01 20:12:08,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:12:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2023-04-01 20:12:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 20:12:08,770 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:08,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:08,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 20:12:08,770 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:08,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:08,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2024184437, now seen corresponding path program 1 times [2023-04-01 20:12:08,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:08,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416447297] [2023-04-01 20:12:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:08,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:08,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:08,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:08,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:08,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:12:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:08,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 20:12:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:12:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416447297] [2023-04-01 20:12:08,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416447297] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:08,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289132933] [2023-04-01 20:12:08,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:08,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:08,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:08,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:08,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 20:12:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:09,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 20:12:09,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:09,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:12:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:12:09,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289132933] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:12:09,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:12:09,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 17 [2023-04-01 20:12:09,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337425626] [2023-04-01 20:12:09,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:12:09,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 20:12:09,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:09,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 20:12:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2023-04-01 20:12:09,222 INFO L87 Difference]: Start difference. First operand 127 states and 175 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 20:12:10,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:10,071 INFO L93 Difference]: Finished difference Result 238 states and 333 transitions. [2023-04-01 20:12:10,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 20:12:10,072 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 47 [2023-04-01 20:12:10,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:10,073 INFO L225 Difference]: With dead ends: 238 [2023-04-01 20:12:10,073 INFO L226 Difference]: Without dead ends: 177 [2023-04-01 20:12:10,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2023-04-01 20:12:10,075 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 175 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:10,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 62 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:12:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-04-01 20:12:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 137. [2023-04-01 20:12:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 108 states have (on average 1.3518518518518519) internal successors, (146), 110 states have internal predecessors, (146), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) [2023-04-01 20:12:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 186 transitions. [2023-04-01 20:12:10,090 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 186 transitions. Word has length 47 [2023-04-01 20:12:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:10,091 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 186 transitions. [2023-04-01 20:12:10,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 20:12:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 186 transitions. [2023-04-01 20:12:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 20:12:10,092 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:10,092 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:10,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:10,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 20:12:10,298 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:10,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:10,298 INFO L85 PathProgramCache]: Analyzing trace with hash -364506001, now seen corresponding path program 1 times [2023-04-01 20:12:10,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:10,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690724867] [2023-04-01 20:12:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:10,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:10,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:10,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:10,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:10,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:12:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:10,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 20:12:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:10,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 20:12:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:12:10,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:10,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690724867] [2023-04-01 20:12:10,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690724867] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:12:10,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:12:10,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 20:12:10,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954950945] [2023-04-01 20:12:10,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:12:10,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 20:12:10,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:10,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 20:12:10,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-04-01 20:12:10,666 INFO L87 Difference]: Start difference. First operand 137 states and 186 transitions. Second operand has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 20:12:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:11,505 INFO L93 Difference]: Finished difference Result 195 states and 263 transitions. [2023-04-01 20:12:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 20:12:11,505 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2023-04-01 20:12:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:11,507 INFO L225 Difference]: With dead ends: 195 [2023-04-01 20:12:11,507 INFO L226 Difference]: Without dead ends: 187 [2023-04-01 20:12:11,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-04-01 20:12:11,508 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 187 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:11,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 67 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:12:11,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-04-01 20:12:11,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 142. [2023-04-01 20:12:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 112 states have (on average 1.3392857142857142) internal successors, (150), 113 states have internal predecessors, (150), 19 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (23), 18 states have call predecessors, (23), 17 states have call successors, (23) [2023-04-01 20:12:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 192 transitions. [2023-04-01 20:12:11,527 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 192 transitions. Word has length 48 [2023-04-01 20:12:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:11,527 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 192 transitions. [2023-04-01 20:12:11,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 20:12:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 192 transitions. [2023-04-01 20:12:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 20:12:11,529 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:11,529 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:11,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 20:12:11,530 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:11,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:11,530 INFO L85 PathProgramCache]: Analyzing trace with hash -131932266, now seen corresponding path program 2 times [2023-04-01 20:12:11,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:11,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142858777] [2023-04-01 20:12:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:11,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:11,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:11,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:11,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:11,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:12:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 20:12:11,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:11,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142858777] [2023-04-01 20:12:11,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142858777] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:11,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812691777] [2023-04-01 20:12:11,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 20:12:11,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:11,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:11,721 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:11,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 20:12:11,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-04-01 20:12:11,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:12:11,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 20:12:11,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 20:12:11,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:12:11,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812691777] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:12:11,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:12:11,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 14 [2023-04-01 20:12:11,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922735282] [2023-04-01 20:12:11,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:12:11,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 20:12:11,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:11,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 20:12:11,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:12:11,964 INFO L87 Difference]: Start difference. First operand 142 states and 192 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:12:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:12,192 INFO L93 Difference]: Finished difference Result 268 states and 368 transitions. [2023-04-01 20:12:12,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:12:12,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2023-04-01 20:12:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:12,194 INFO L225 Difference]: With dead ends: 268 [2023-04-01 20:12:12,194 INFO L226 Difference]: Without dead ends: 216 [2023-04-01 20:12:12,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-04-01 20:12:12,195 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 143 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:12,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1376 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:12:12,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-04-01 20:12:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 184. [2023-04-01 20:12:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 147 states have (on average 1.3401360544217686) internal successors, (197), 149 states have internal predecessors, (197), 23 states have call successors, (23), 12 states have call predecessors, (23), 13 states have return successors, (30), 22 states have call predecessors, (30), 21 states have call successors, (30) [2023-04-01 20:12:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 250 transitions. [2023-04-01 20:12:12,214 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 250 transitions. Word has length 47 [2023-04-01 20:12:12,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:12,217 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 250 transitions. [2023-04-01 20:12:12,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:12:12,218 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 250 transitions. [2023-04-01 20:12:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 20:12:12,219 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:12,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:12,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:12,424 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 [2023-04-01 20:12:12,425 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:12,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:12,425 INFO L85 PathProgramCache]: Analyzing trace with hash -524959276, now seen corresponding path program 1 times [2023-04-01 20:12:12,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:12,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400985698] [2023-04-01 20:12:12,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:12,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:12,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:12,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:12,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:12,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:12:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 20:12:12,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:12,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400985698] [2023-04-01 20:12:12,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400985698] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:12,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830233802] [2023-04-01 20:12:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:12,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:12,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:12,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:12,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 20:12:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:12,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 20:12:12,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 20:12:13,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:12:13,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830233802] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:12:13,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:12:13,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [10] total 18 [2023-04-01 20:12:13,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253222766] [2023-04-01 20:12:13,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:12:13,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 20:12:13,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:13,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 20:12:13,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2023-04-01 20:12:13,003 INFO L87 Difference]: Start difference. First operand 184 states and 250 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 20:12:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:13,274 INFO L93 Difference]: Finished difference Result 331 states and 464 transitions. [2023-04-01 20:12:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 20:12:13,274 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2023-04-01 20:12:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:13,276 INFO L225 Difference]: With dead ends: 331 [2023-04-01 20:12:13,276 INFO L226 Difference]: Without dead ends: 266 [2023-04-01 20:12:13,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-04-01 20:12:13,277 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 141 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:13,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1617 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:12:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-04-01 20:12:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 248. [2023-04-01 20:12:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 201 states have (on average 1.3482587064676617) internal successors, (271), 203 states have internal predecessors, (271), 30 states have call successors, (30), 15 states have call predecessors, (30), 16 states have return successors, (40), 29 states have call predecessors, (40), 28 states have call successors, (40) [2023-04-01 20:12:13,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 341 transitions. [2023-04-01 20:12:13,308 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 341 transitions. Word has length 47 [2023-04-01 20:12:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:13,308 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 341 transitions. [2023-04-01 20:12:13,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 20:12:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 341 transitions. [2023-04-01 20:12:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 20:12:13,310 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:13,310 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:13,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:13,515 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 [2023-04-01 20:12:13,515 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:13,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:13,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1640701011, now seen corresponding path program 1 times [2023-04-01 20:12:13,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:13,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085681698] [2023-04-01 20:12:13,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:13,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:13,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:13,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:13,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:13,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:12:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:13,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 20:12:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:13,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 20:12:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 20:12:13,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:13,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085681698] [2023-04-01 20:12:13,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085681698] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:12:13,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:12:13,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 20:12:13,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200747331] [2023-04-01 20:12:13,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:12:13,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:12:13,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:13,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:12:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:12:13,598 INFO L87 Difference]: Start difference. First operand 248 states and 341 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 20:12:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:13,858 INFO L93 Difference]: Finished difference Result 256 states and 348 transitions. [2023-04-01 20:12:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 20:12:13,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2023-04-01 20:12:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:13,861 INFO L225 Difference]: With dead ends: 256 [2023-04-01 20:12:13,861 INFO L226 Difference]: Without dead ends: 241 [2023-04-01 20:12:13,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:12:13,862 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:13,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 27 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:12:13,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-04-01 20:12:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2023-04-01 20:12:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 196 states have (on average 1.3520408163265305) internal successors, (265), 199 states have internal predecessors, (265), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (36), 26 states have call predecessors, (36), 26 states have call successors, (36) [2023-04-01 20:12:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 329 transitions. [2023-04-01 20:12:13,883 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 329 transitions. Word has length 50 [2023-04-01 20:12:13,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:13,883 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 329 transitions. [2023-04-01 20:12:13,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 20:12:13,884 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 329 transitions. [2023-04-01 20:12:13,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 20:12:13,885 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:13,885 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:13,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 20:12:13,885 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:13,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:13,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1295537030, now seen corresponding path program 1 times [2023-04-01 20:12:13,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:13,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456203794] [2023-04-01 20:12:13,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:13,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:13,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:13,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:12:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 20:12:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:12:14,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456203794] [2023-04-01 20:12:14,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456203794] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:12:14,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:12:14,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 20:12:14,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17035174] [2023-04-01 20:12:14,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:12:14,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 20:12:14,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 20:12:14,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:12:14,036 INFO L87 Difference]: Start difference. First operand 241 states and 329 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:12:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:14,481 INFO L93 Difference]: Finished difference Result 263 states and 352 transitions. [2023-04-01 20:12:14,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:12:14,482 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2023-04-01 20:12:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:14,483 INFO L225 Difference]: With dead ends: 263 [2023-04-01 20:12:14,483 INFO L226 Difference]: Without dead ends: 228 [2023-04-01 20:12:14,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-04-01 20:12:14,484 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 112 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:14,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 42 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 20:12:14,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-04-01 20:12:14,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 219. [2023-04-01 20:12:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 176 states have (on average 1.3295454545454546) internal successors, (234), 179 states have internal predecessors, (234), 26 states have call successors, (26), 15 states have call predecessors, (26), 16 states have return successors, (34), 24 states have call predecessors, (34), 24 states have call successors, (34) [2023-04-01 20:12:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 294 transitions. [2023-04-01 20:12:14,499 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 294 transitions. Word has length 51 [2023-04-01 20:12:14,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:14,500 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 294 transitions. [2023-04-01 20:12:14,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:12:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 294 transitions. [2023-04-01 20:12:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 20:12:14,519 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:14,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:14,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 20:12:14,519 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:14,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:14,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2057287711, now seen corresponding path program 1 times [2023-04-01 20:12:14,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:14,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940920876] [2023-04-01 20:12:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:14,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:12:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:12:14,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:14,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940920876] [2023-04-01 20:12:14,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940920876] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:12:14,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:12:14,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 20:12:14,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652133540] [2023-04-01 20:12:14,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:12:14,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:12:14,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:14,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:12:14,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:12:14,557 INFO L87 Difference]: Start difference. First operand 219 states and 294 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:12:14,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:14,726 INFO L93 Difference]: Finished difference Result 366 states and 494 transitions. [2023-04-01 20:12:14,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 20:12:14,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2023-04-01 20:12:14,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:14,728 INFO L225 Difference]: With dead ends: 366 [2023-04-01 20:12:14,728 INFO L226 Difference]: Without dead ends: 232 [2023-04-01 20:12:14,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:12:14,729 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 107 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:14,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 12 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 20:12:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-01 20:12:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2023-04-01 20:12:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 179 states have (on average 1.329608938547486) internal successors, (238), 182 states have internal predecessors, (238), 26 states have call successors, (26), 15 states have call predecessors, (26), 16 states have return successors, (34), 24 states have call predecessors, (34), 24 states have call successors, (34) [2023-04-01 20:12:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 298 transitions. [2023-04-01 20:12:14,745 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 298 transitions. Word has length 50 [2023-04-01 20:12:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:14,745 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 298 transitions. [2023-04-01 20:12:14,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:12:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 298 transitions. [2023-04-01 20:12:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 20:12:14,747 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:14,747 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:14,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 20:12:14,747 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:14,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1707192092, now seen corresponding path program 1 times [2023-04-01 20:12:14,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:14,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974637919] [2023-04-01 20:12:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:14,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:12:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 20:12:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:14,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-04-01 20:12:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 20:12:15,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:15,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974637919] [2023-04-01 20:12:15,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974637919] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:15,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28523226] [2023-04-01 20:12:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:15,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:15,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:15,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:15,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 20:12:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:15,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-01 20:12:15,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 20:12:15,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:12:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 20:12:15,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28523226] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:12:15,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:12:15,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 13] total 33 [2023-04-01 20:12:15,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835470043] [2023-04-01 20:12:15,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:12:15,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 20:12:15,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:15,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 20:12:15,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 20:12:15,717 INFO L87 Difference]: Start difference. First operand 222 states and 298 transitions. Second operand has 33 states, 29 states have (on average 1.793103448275862) internal successors, (52), 25 states have internal predecessors, (52), 6 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 20:12:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:19,004 INFO L93 Difference]: Finished difference Result 435 states and 609 transitions. [2023-04-01 20:12:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-04-01 20:12:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 1.793103448275862) internal successors, (52), 25 states have internal predecessors, (52), 6 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 5 states have call successors, (11) Word has length 52 [2023-04-01 20:12:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:19,007 INFO L225 Difference]: With dead ends: 435 [2023-04-01 20:12:19,007 INFO L226 Difference]: Without dead ends: 410 [2023-04-01 20:12:19,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=533, Invalid=5017, Unknown=0, NotChecked=0, Total=5550 [2023-04-01 20:12:19,010 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 551 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4236 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 4393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 4236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:19,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 107 Invalid, 4393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 4236 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 20:12:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-04-01 20:12:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 267. [2023-04-01 20:12:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 214 states have (on average 1.3130841121495327) internal successors, (281), 222 states have internal predecessors, (281), 31 states have call successors, (31), 14 states have call predecessors, (31), 21 states have return successors, (51), 30 states have call predecessors, (51), 29 states have call successors, (51) [2023-04-01 20:12:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 363 transitions. [2023-04-01 20:12:19,045 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 363 transitions. Word has length 52 [2023-04-01 20:12:19,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:19,045 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 363 transitions. [2023-04-01 20:12:19,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 1.793103448275862) internal successors, (52), 25 states have internal predecessors, (52), 6 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 20:12:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 363 transitions. [2023-04-01 20:12:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 20:12:19,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:19,047 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:19,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:19,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 20:12:19,253 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:19,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:19,254 INFO L85 PathProgramCache]: Analyzing trace with hash 47662558, now seen corresponding path program 2 times [2023-04-01 20:12:19,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:19,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055126423] [2023-04-01 20:12:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:19,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:19,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:19,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:19,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:19,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:12:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:19,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 20:12:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:19,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-04-01 20:12:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 20:12:19,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:19,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055126423] [2023-04-01 20:12:19,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055126423] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:19,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374145096] [2023-04-01 20:12:19,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 20:12:19,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:19,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:19,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:19,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 20:12:19,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 20:12:19,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:12:19,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-01 20:12:19,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 20:12:19,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:12:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 20:12:20,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374145096] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:12:20,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:12:20,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 13] total 33 [2023-04-01 20:12:20,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823450422] [2023-04-01 20:12:20,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:12:20,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 20:12:20,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:20,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 20:12:20,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 20:12:20,096 INFO L87 Difference]: Start difference. First operand 267 states and 363 transitions. Second operand has 33 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 25 states have internal predecessors, (53), 6 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 9 states have call predecessors, (12), 5 states have call successors, (12) [2023-04-01 20:12:23,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:23,236 INFO L93 Difference]: Finished difference Result 451 states and 653 transitions. [2023-04-01 20:12:23,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-04-01 20:12:23,237 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 25 states have internal predecessors, (53), 6 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 9 states have call predecessors, (12), 5 states have call successors, (12) Word has length 52 [2023-04-01 20:12:23,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:23,239 INFO L225 Difference]: With dead ends: 451 [2023-04-01 20:12:23,239 INFO L226 Difference]: Without dead ends: 438 [2023-04-01 20:12:23,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=471, Invalid=4499, Unknown=0, NotChecked=0, Total=4970 [2023-04-01 20:12:23,241 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 528 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4938 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 5068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 4938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:23,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 122 Invalid, 5068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 4938 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 20:12:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-04-01 20:12:23,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 280. [2023-04-01 20:12:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 222 states have (on average 1.3018018018018018) internal successors, (289), 230 states have internal predecessors, (289), 35 states have call successors, (35), 15 states have call predecessors, (35), 22 states have return successors, (65), 34 states have call predecessors, (65), 33 states have call successors, (65) [2023-04-01 20:12:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 389 transitions. [2023-04-01 20:12:23,283 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 389 transitions. Word has length 52 [2023-04-01 20:12:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:23,283 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 389 transitions. [2023-04-01 20:12:23,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 25 states have internal predecessors, (53), 6 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 9 states have call predecessors, (12), 5 states have call successors, (12) [2023-04-01 20:12:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 389 transitions. [2023-04-01 20:12:23,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 20:12:23,284 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:23,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:23,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:23,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:23,489 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:23,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:23,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1172613707, now seen corresponding path program 1 times [2023-04-01 20:12:23,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:23,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586706753] [2023-04-01 20:12:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:23,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:23,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:23,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:23,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:23,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:12:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:12:23,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:23,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586706753] [2023-04-01 20:12:23,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586706753] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:12:23,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:12:23,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 20:12:23,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884514872] [2023-04-01 20:12:23,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:12:23,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:12:23,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:23,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:12:23,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:12:23,539 INFO L87 Difference]: Start difference. First operand 280 states and 389 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:12:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:23,723 INFO L93 Difference]: Finished difference Result 475 states and 662 transitions. [2023-04-01 20:12:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 20:12:23,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-04-01 20:12:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:23,725 INFO L225 Difference]: With dead ends: 475 [2023-04-01 20:12:23,725 INFO L226 Difference]: Without dead ends: 283 [2023-04-01 20:12:23,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:12:23,727 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 97 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:23,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 12 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:12:23,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-04-01 20:12:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 282. [2023-04-01 20:12:23,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 224 states have (on average 1.2991071428571428) internal successors, (291), 232 states have internal predecessors, (291), 35 states have call successors, (35), 15 states have call predecessors, (35), 22 states have return successors, (65), 34 states have call predecessors, (65), 33 states have call successors, (65) [2023-04-01 20:12:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 391 transitions. [2023-04-01 20:12:23,756 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 391 transitions. Word has length 51 [2023-04-01 20:12:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:23,757 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 391 transitions. [2023-04-01 20:12:23,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:12:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 391 transitions. [2023-04-01 20:12:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 20:12:23,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:23,758 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:23,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 20:12:23,758 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:23,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash 354965257, now seen corresponding path program 1 times [2023-04-01 20:12:23,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:23,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277159813] [2023-04-01 20:12:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:23,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:23,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:23,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:23,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:23,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:12:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:12:23,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:23,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277159813] [2023-04-01 20:12:23,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277159813] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:23,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786162110] [2023-04-01 20:12:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:23,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:23,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:23,913 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:23,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 20:12:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:23,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 20:12:23,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:12:24,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:12:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:12:24,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786162110] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:12:24,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:12:24,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-04-01 20:12:24,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112591571] [2023-04-01 20:12:24,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:12:24,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:12:24,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:24,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:12:24,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:12:24,109 INFO L87 Difference]: Start difference. First operand 282 states and 391 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:12:24,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:24,644 INFO L93 Difference]: Finished difference Result 398 states and 552 transitions. [2023-04-01 20:12:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 20:12:24,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2023-04-01 20:12:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:24,646 INFO L225 Difference]: With dead ends: 398 [2023-04-01 20:12:24,646 INFO L226 Difference]: Without dead ends: 332 [2023-04-01 20:12:24,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-04-01 20:12:24,647 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 273 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:24,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 47 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 20:12:24,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-04-01 20:12:24,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 321. [2023-04-01 20:12:24,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 257 states have (on average 1.3035019455252919) internal successors, (335), 267 states have internal predecessors, (335), 37 states have call successors, (37), 17 states have call predecessors, (37), 26 states have return successors, (66), 36 states have call predecessors, (66), 35 states have call successors, (66) [2023-04-01 20:12:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 438 transitions. [2023-04-01 20:12:24,676 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 438 transitions. Word has length 51 [2023-04-01 20:12:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:24,676 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 438 transitions. [2023-04-01 20:12:24,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:12:24,676 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 438 transitions. [2023-04-01 20:12:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 20:12:24,677 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:24,677 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:24,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:24,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:24,882 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:24,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:24,883 INFO L85 PathProgramCache]: Analyzing trace with hash -38061753, now seen corresponding path program 1 times [2023-04-01 20:12:24,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:24,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139231636] [2023-04-01 20:12:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:24,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:25,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:25,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:25,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:25,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:12:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:25,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:25,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139231636] [2023-04-01 20:12:25,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139231636] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:25,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774286620] [2023-04-01 20:12:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:25,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:25,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:25,417 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:25,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 20:12:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:25,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 20:12:25,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:12:25,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:12:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:12:25,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774286620] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:12:25,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:12:25,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 32 [2023-04-01 20:12:25,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067707745] [2023-04-01 20:12:25,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:12:25,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 20:12:25,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:25,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 20:12:25,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2023-04-01 20:12:25,860 INFO L87 Difference]: Start difference. First operand 321 states and 438 transitions. Second operand has 32 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 23 states have internal predecessors, (68), 8 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 20:12:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:28,205 INFO L93 Difference]: Finished difference Result 610 states and 868 transitions. [2023-04-01 20:12:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 20:12:28,205 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 23 states have internal predecessors, (68), 8 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 51 [2023-04-01 20:12:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:28,208 INFO L225 Difference]: With dead ends: 610 [2023-04-01 20:12:28,208 INFO L226 Difference]: Without dead ends: 454 [2023-04-01 20:12:28,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=305, Invalid=3001, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 20:12:28,210 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 435 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3741 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 3741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:28,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 112 Invalid, 3811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 3741 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 20:12:28,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-04-01 20:12:28,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 367. [2023-04-01 20:12:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 295 states have (on average 1.2949152542372881) internal successors, (382), 308 states have internal predecessors, (382), 40 states have call successors, (40), 19 states have call predecessors, (40), 31 states have return successors, (75), 39 states have call predecessors, (75), 38 states have call successors, (75) [2023-04-01 20:12:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 497 transitions. [2023-04-01 20:12:28,281 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 497 transitions. Word has length 51 [2023-04-01 20:12:28,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:28,282 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 497 transitions. [2023-04-01 20:12:28,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 23 states have internal predecessors, (68), 8 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 20:12:28,282 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 497 transitions. [2023-04-01 20:12:28,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 20:12:28,284 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:28,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:28,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:28,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 20:12:28,490 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:28,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:28,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1673446143, now seen corresponding path program 2 times [2023-04-01 20:12:28,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:28,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653220173] [2023-04-01 20:12:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:28,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:28,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:28,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:28,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:28,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 20:12:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:12:28,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:28,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653220173] [2023-04-01 20:12:28,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653220173] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:12:28,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:12:28,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 20:12:28,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4614327] [2023-04-01 20:12:28,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:12:28,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 20:12:28,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:28,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 20:12:28,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:12:28,670 INFO L87 Difference]: Start difference. First operand 367 states and 497 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:12:29,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:29,280 INFO L93 Difference]: Finished difference Result 538 states and 740 transitions. [2023-04-01 20:12:29,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:12:29,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-04-01 20:12:29,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:29,283 INFO L225 Difference]: With dead ends: 538 [2023-04-01 20:12:29,283 INFO L226 Difference]: Without dead ends: 393 [2023-04-01 20:12:29,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-04-01 20:12:29,284 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 224 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:29,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 42 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:12:29,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-04-01 20:12:29,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 367. [2023-04-01 20:12:29,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 295 states have (on average 1.2881355932203389) internal successors, (380), 308 states have internal predecessors, (380), 40 states have call successors, (40), 19 states have call predecessors, (40), 31 states have return successors, (75), 39 states have call predecessors, (75), 38 states have call successors, (75) [2023-04-01 20:12:29,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 495 transitions. [2023-04-01 20:12:29,322 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 495 transitions. Word has length 51 [2023-04-01 20:12:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:29,322 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 495 transitions. [2023-04-01 20:12:29,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:12:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 495 transitions. [2023-04-01 20:12:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 20:12:29,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:29,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:29,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 20:12:29,325 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:29,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1755780700, now seen corresponding path program 1 times [2023-04-01 20:12:29,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:29,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763510977] [2023-04-01 20:12:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:29,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:29,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:29,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:29,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:29,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 20:12:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:29,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:29,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763510977] [2023-04-01 20:12:29,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763510977] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:29,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601833175] [2023-04-01 20:12:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:29,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:29,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:29,859 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:29,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 20:12:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:30,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 20:12:30,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:30,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:30,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:12:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:31,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601833175] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:12:31,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:12:31,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 47 [2023-04-01 20:12:31,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472254207] [2023-04-01 20:12:31,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:12:31,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-04-01 20:12:31,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:31,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-04-01 20:12:31,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2025, Unknown=0, NotChecked=0, Total=2162 [2023-04-01 20:12:31,884 INFO L87 Difference]: Start difference. First operand 367 states and 495 transitions. Second operand has 47 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 35 states have internal predecessors, (78), 11 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 20:12:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:36,314 INFO L93 Difference]: Finished difference Result 567 states and 799 transitions. [2023-04-01 20:12:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 20:12:36,315 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 35 states have internal predecessors, (78), 11 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 52 [2023-04-01 20:12:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:36,318 INFO L225 Difference]: With dead ends: 567 [2023-04-01 20:12:36,318 INFO L226 Difference]: Without dead ends: 473 [2023-04-01 20:12:36,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=432, Invalid=5574, Unknown=0, NotChecked=0, Total=6006 [2023-04-01 20:12:36,321 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 457 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 5264 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 5359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 5264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:36,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 152 Invalid, 5359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 5264 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 20:12:36,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-04-01 20:12:36,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 408. [2023-04-01 20:12:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 328 states have (on average 1.2896341463414633) internal successors, (423), 343 states have internal predecessors, (423), 44 states have call successors, (44), 21 states have call predecessors, (44), 35 states have return successors, (85), 43 states have call predecessors, (85), 42 states have call successors, (85) [2023-04-01 20:12:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 552 transitions. [2023-04-01 20:12:36,370 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 552 transitions. Word has length 52 [2023-04-01 20:12:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:36,370 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 552 transitions. [2023-04-01 20:12:36,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 35 states have internal predecessors, (78), 11 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 20:12:36,370 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 552 transitions. [2023-04-01 20:12:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 20:12:36,372 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:36,372 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:36,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:36,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-01 20:12:36,578 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:36,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:36,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1953630662, now seen corresponding path program 1 times [2023-04-01 20:12:36,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:36,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918136742] [2023-04-01 20:12:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:36,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:36,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:12:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:36,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:12:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:36,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:12:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:36,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:12:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:36,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 20:12:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:36,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-04-01 20:12:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 20:12:36,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:12:36,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918136742] [2023-04-01 20:12:36,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918136742] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:12:36,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950148334] [2023-04-01 20:12:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:36,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:12:36,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:12:36,693 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:12:36,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 20:12:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:12:36,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 20:12:36,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 20:12:36,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:12:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 20:12:37,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950148334] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:12:37,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:12:37,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 10] total 22 [2023-04-01 20:12:37,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131086953] [2023-04-01 20:12:37,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:12:37,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 20:12:37,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:37,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 20:12:37,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-04-01 20:12:37,096 INFO L87 Difference]: Start difference. First operand 408 states and 552 transitions. Second operand has 22 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-01 20:12:38,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:12:38,263 INFO L93 Difference]: Finished difference Result 517 states and 731 transitions. [2023-04-01 20:12:38,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 20:12:38,264 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 4 states have call successors, (12) Word has length 54 [2023-04-01 20:12:38,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:12:38,266 INFO L225 Difference]: With dead ends: 517 [2023-04-01 20:12:38,266 INFO L226 Difference]: Without dead ends: 479 [2023-04-01 20:12:38,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 20:12:38,268 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 398 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:12:38,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 72 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 20:12:38,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-04-01 20:12:38,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 404. [2023-04-01 20:12:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 323 states have (on average 1.2879256965944272) internal successors, (416), 340 states have internal predecessors, (416), 45 states have call successors, (45), 19 states have call predecessors, (45), 35 states have return successors, (97), 44 states have call predecessors, (97), 43 states have call successors, (97) [2023-04-01 20:12:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 558 transitions. [2023-04-01 20:12:38,318 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 558 transitions. Word has length 54 [2023-04-01 20:12:38,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:12:38,318 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 558 transitions. [2023-04-01 20:12:38,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-01 20:12:38,319 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 558 transitions. [2023-04-01 20:12:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 20:12:38,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:12:38,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:38,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 20:12:38,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 20:12:38,528 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:12:38,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:12:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash 297149222, now seen corresponding path program 1 times [2023-04-01 20:12:38,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:12:38,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546514530] [2023-04-01 20:12:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:12:38,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:12:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 20:12:38,562 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 20:12:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 20:12:38,618 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-04-01 20:12:38,619 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 20:12:38,620 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 20:12:38,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 20:12:38,624 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:12:38,626 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 20:12:38,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 08:12:38 BoogieIcfgContainer [2023-04-01 20:12:38,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 20:12:38,672 INFO L158 Benchmark]: Toolchain (without parser) took 34697.34ms. Allocated memory was 194.0MB in the beginning and 373.3MB in the end (delta: 179.3MB). Free memory was 147.5MB in the beginning and 325.0MB in the end (delta: -177.5MB). Peak memory consumption was 2.5MB. Max. memory is 8.0GB. [2023-04-01 20:12:38,672 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 194.0MB. Free memory is still 148.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 20:12:38,673 INFO L158 Benchmark]: CACSL2BoogieTranslator took 322.26ms. Allocated memory is still 194.0MB. Free memory was 147.2MB in the beginning and 134.2MB in the end (delta: 13.0MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-04-01 20:12:38,673 INFO L158 Benchmark]: Boogie Preprocessor took 31.50ms. Allocated memory is still 194.0MB. Free memory was 134.2MB in the beginning and 132.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 20:12:38,675 INFO L158 Benchmark]: RCFGBuilder took 533.90ms. Allocated memory is still 194.0MB. Free memory was 132.1MB in the beginning and 108.7MB in the end (delta: 23.4MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. [2023-04-01 20:12:38,678 INFO L158 Benchmark]: TraceAbstraction took 33805.56ms. Allocated memory was 194.0MB in the beginning and 373.3MB in the end (delta: 179.3MB). Free memory was 108.0MB in the beginning and 325.0MB in the end (delta: -217.0MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 20:12:38,680 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 194.0MB. Free memory is still 148.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 322.26ms. Allocated memory is still 194.0MB. Free memory was 147.2MB in the beginning and 134.2MB in the end (delta: 13.0MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.50ms. Allocated memory is still 194.0MB. Free memory was 134.2MB in the beginning and 132.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 533.90ms. Allocated memory is still 194.0MB. Free memory was 132.1MB in the beginning and 108.7MB in the end (delta: 23.4MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. * TraceAbstraction took 33805.56ms. Allocated memory was 194.0MB in the beginning and 373.3MB in the end (delta: 179.3MB). Free memory was 108.0MB in the beginning and 325.0MB in the end (delta: -217.0MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 111, overapproximation of bitwiseAnd at line 77. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add1 ; [L234] unsigned int r_add2 ; [L235] unsigned int zero ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int __retres14 ; VAL [ea=127, eb=-128, ma=33554432] [L242] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L81] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L242] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=-128, ma=33554432] [L242] zero = base2flt(0, 0) [L243] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L81] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, __retres4=4294967295, e=127, m=33554432] [L243] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=-128, ma=33554432, zero=0] [L243] a = base2flt(ma, ea) [L244] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=-128, \old(m)=16777216] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L30] COND FALSE !(! m) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L58] COND TRUE 1 VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L77] EXPR m & ~ (1U << 24U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m & ~ (1U << 24U)=4311744512, m=16777216] [L77] m = m & ~ (1U << 24U) [L78] EXPR m | ((unsigned int )(e + 128) << 24U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m | ((unsigned int )(e + 128) << 24U)=4311744512, m=16777216] [L78] res = m | ((unsigned int )(e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=-128, \old(m)=16777216, __retres4=16777216, e=-128, m=16777216, res=16777216] [L81] return (__retres4); VAL [\old(e)=-128, \old(m)=16777216, \result=4311744512, __retres4=16777216, e=-128, m=16777216, res=16777216] [L244] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=4311744512, ea=127, eb=-128, ma=33554432, mb=16777216, zero=0] [L244] b = base2flt(mb, eb) [L245] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=16777216] [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216] [L95] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216, ea=127, ma=16777215] [L111] EXPR ma | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216, ea=127, ma | (1U << 24U)=-4261412865, ma=16777215] [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216, ea=127, eb=129, ma=33554431, mb=0] [L114] EXPR mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216, ea=127, eb=129, ma=33554431, mb | (1U << 24U)=16777216, mb=0] [L114] mb = mb | (1U << 24U) [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 107 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 33.7s, OverallIterations: 19, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 21.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4609 SdHoareTripleChecker+Valid, 14.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4453 mSDsluCounter, 4036 SdHoareTripleChecker+Invalid, 12.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3622 mSDsCounter, 649 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 29835 IncrementalHoareTripleChecker+Invalid, 30484 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 649 mSolverCounterUnsat, 414 mSDtfsCounter, 29835 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1507 GetRequests, 958 SyntacticMatches, 16 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4387 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=408occurred in iteration=17, InterpolantAutomatonStates: 312, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 18 MinimizatonAttempts, 778 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 1428 NumberOfCodeBlocks, 1410 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1737 ConstructedInterpolants, 0 QuantifiedInterpolants, 5549 SizeOfPredicates, 58 NumberOfNonLiveVariables, 1608 ConjunctsInSsa, 261 ConjunctsInUnsatCore, 36 InterpolantComputations, 10 PerfectInterpolantSequences, 545/673 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-04-01 20:12:38,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...