/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/list-ext3-properties/dll_nullified-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:12:09,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:12:09,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:12:09,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 01:12:09,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 01:12:09,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 01:12:09,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 01:12:09,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 01:12:09,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 01:12:09,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 01:12:09,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 01:12:09,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 01:12:09,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:12:09,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:12:09,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:12:09,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:12:09,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:12:09,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:12:09,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:12:09,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:12:09,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:12:09,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:12:09,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:12:09,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:12:09,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 01:12:09,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 01:12:09,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 01:12:09,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 01:12:09,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 01:12:09,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 01:12:09,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 01:12:09,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 01:12:09,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 01:12:09,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 01:12:09,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 01:12:09,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 01:12:09,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 01:12:09,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 01:12:09,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:12:09,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:12:09,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:12:09,348 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 01:12:09,377 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:12:09,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:12:09,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:12:09,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:12:09,379 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:12:09,379 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:12:09,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:12:09,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:12:09,380 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:12:09,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:12:09,381 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:12:09,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:12:09,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:12:09,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:12:09,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:12:09,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:12:09,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:12:09,382 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:12:09,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:12:09,382 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:12:09,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:12:09,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:12:09,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:12:09,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:12:09,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:12:09,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:12:09,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:12:09,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:12:09,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:12:09,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:12:09,384 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:12:09,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:12:09,384 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:12:09,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:12:09,385 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:12:09,385 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:12:09,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:12:09,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:12:09,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:12:09,671 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:12:09,672 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:12:09,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i [2023-04-02 01:12:10,885 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:12:11,132 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:12:11,133 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i [2023-04-02 01:12:11,150 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62cec029c/bae6abb831b344248f1b259342bc4498/FLAG2f8cc3e94 [2023-04-02 01:12:11,164 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62cec029c/bae6abb831b344248f1b259342bc4498 [2023-04-02 01:12:11,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:12:11,168 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:12:11,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:12:11,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:12:11,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:12:11,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:12:11" (1/1) ... [2023-04-02 01:12:11,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bde3b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:11, skipping insertion in model container [2023-04-02 01:12:11,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:12:11" (1/1) ... [2023-04-02 01:12:11,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:12:11,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:12:11,480 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/list-ext3-properties/dll_nullified-2.i[23974,23987] [2023-04-02 01:12:11,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:12:11,492 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:12:11,540 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/list-ext3-properties/dll_nullified-2.i[23974,23987] [2023-04-02 01:12:11,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:12:11,567 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:12:11,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:11 WrapperNode [2023-04-02 01:12:11,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:12:11,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:12:11,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:12:11,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:12:11,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:11" (1/1) ... [2023-04-02 01:12:11,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:11" (1/1) ... [2023-04-02 01:12:11,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:11" (1/1) ... [2023-04-02 01:12:11,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:11" (1/1) ... [2023-04-02 01:12:11,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:11" (1/1) ... [2023-04-02 01:12:11,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:11" (1/1) ... [2023-04-02 01:12:11,612 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:11" (1/1) ... [2023-04-02 01:12:11,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:11" (1/1) ... [2023-04-02 01:12:11,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:12:11,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:12:11,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:12:11,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:12:11,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:11" (1/1) ... [2023-04-02 01:12:11,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:12:11,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:11,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 01:12:11,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 01:12:11,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:12:11,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:12:11,686 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:12:11,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-02 01:12:11,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-02 01:12:11,687 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-02 01:12:11,687 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2023-04-02 01:12:11,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:12:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:12:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:12:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 01:12:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 01:12:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:12:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:12:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-02 01:12:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-02 01:12:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-02 01:12:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-02 01:12:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-02 01:12:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-02 01:12:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-02 01:12:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-02 01:12:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-02 01:12:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-02 01:12:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-02 01:12:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-02 01:12:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-02 01:12:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-02 01:12:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-02 01:12:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-02 01:12:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-02 01:12:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-02 01:12:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-02 01:12:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-02 01:12:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-02 01:12:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-02 01:12:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-02 01:12:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-02 01:12:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-02 01:12:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-02 01:12:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-02 01:12:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-02 01:12:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-02 01:12:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-02 01:12:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-02 01:12:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-02 01:12:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-02 01:12:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-02 01:12:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-02 01:12:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-02 01:12:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-02 01:12:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-02 01:12:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-02 01:12:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-02 01:12:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-02 01:12:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-02 01:12:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-02 01:12:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-02 01:12:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-02 01:12:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-02 01:12:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-02 01:12:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-02 01:12:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-02 01:12:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-02 01:12:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-02 01:12:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-02 01:12:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 01:12:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 01:12:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-02 01:12:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 01:12:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-02 01:12:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-02 01:12:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-02 01:12:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-02 01:12:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-02 01:12:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-02 01:12:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-02 01:12:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-02 01:12:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 01:12:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-02 01:12:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-02 01:12:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-02 01:12:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-02 01:12:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-02 01:12:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-02 01:12:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-02 01:12:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-02 01:12:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-02 01:12:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-02 01:12:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-02 01:12:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-02 01:12:11,697 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-02 01:12:11,697 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-02 01:12:11,697 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-02 01:12:11,697 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-02 01:12:11,697 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-02 01:12:11,697 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-02 01:12:11,697 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-02 01:12:11,697 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-02 01:12:11,697 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-02 01:12:11,697 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-02 01:12:11,698 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-02 01:12:11,698 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-02 01:12:11,698 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-02 01:12:11,698 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-02 01:12:11,698 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-02 01:12:11,698 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-02 01:12:11,698 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-02 01:12:11,698 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-02 01:12:11,698 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-02 01:12:11,698 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-02 01:12:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-02 01:12:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-02 01:12:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-02 01:12:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-02 01:12:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-02 01:12:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-02 01:12:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-02 01:12:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-02 01:12:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2023-04-02 01:12:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 01:12:11,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:12:11,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 01:12:11,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:12:11,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 01:12:11,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:12:11,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:12:11,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:12:11,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:12:11,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:12:11,948 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:12:11,950 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:12:11,979 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-02 01:12:12,123 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:12:12,128 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:12:12,129 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 01:12:12,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:12:12 BoogieIcfgContainer [2023-04-02 01:12:12,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:12:12,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:12:12,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:12:12,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:12:12,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:12:11" (1/3) ... [2023-04-02 01:12:12,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114db9a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:12:12, skipping insertion in model container [2023-04-02 01:12:12,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:11" (2/3) ... [2023-04-02 01:12:12,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114db9a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:12:12, skipping insertion in model container [2023-04-02 01:12:12,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:12:12" (3/3) ... [2023-04-02 01:12:12,142 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_nullified-2.i [2023-04-02 01:12:12,158 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:12:12,158 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:12:12,200 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:12:12,207 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;@5cd14cf0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:12:12,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:12:12,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:12:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 01:12:12,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:12,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:12,217 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:12,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:12,221 INFO L85 PathProgramCache]: Analyzing trace with hash -229834151, now seen corresponding path program 1 times [2023-04-02 01:12:12,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:12,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036567847] [2023-04-02 01:12:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:12,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:12,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:12,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:12:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:12,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:12,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036567847] [2023-04-02 01:12:12,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036567847] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:12:12,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:12:12,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:12:12,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530649730] [2023-04-02 01:12:12,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:12:12,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:12:12,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:12,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:12:12,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:12:12,560 INFO L87 Difference]: Start difference. First operand has 38 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:12:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:12,800 INFO L93 Difference]: Finished difference Result 81 states and 115 transitions. [2023-04-02 01:12:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 01:12:12,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-04-02 01:12:12,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:12,810 INFO L225 Difference]: With dead ends: 81 [2023-04-02 01:12:12,810 INFO L226 Difference]: Without dead ends: 48 [2023-04-02 01:12:12,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:12:12,820 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 96 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:12,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 7 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:12:12,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-02 01:12:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 30. [2023-04-02 01:12:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-04-02 01:12:12,868 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 20 [2023-04-02 01:12:12,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:12,871 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-04-02 01:12:12,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:12:12,871 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-04-02 01:12:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 01:12:12,873 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:12,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:12,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:12:12,874 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:12,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1798662849, now seen corresponding path program 1 times [2023-04-02 01:12:12,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:12,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940292254] [2023-04-02 01:12:12,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:12,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:13,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:13,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:12:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:13,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:13,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940292254] [2023-04-02 01:12:13,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940292254] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:12:13,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:12:13,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 01:12:13,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272678930] [2023-04-02 01:12:13,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:12:13,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 01:12:13,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:13,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 01:12:13,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 01:12:13,129 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:13,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:13,423 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2023-04-02 01:12:13,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 01:12:13,424 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-04-02 01:12:13,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:13,425 INFO L225 Difference]: With dead ends: 52 [2023-04-02 01:12:13,425 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 01:12:13,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-04-02 01:12:13,431 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:13,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 9 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:12:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 01:12:13,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-04-02 01:12:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-04-02 01:12:13,443 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 20 [2023-04-02 01:12:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:13,443 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-04-02 01:12:13,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-04-02 01:12:13,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 01:12:13,444 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:13,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:13,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:12:13,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:13,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:13,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1790055781, now seen corresponding path program 1 times [2023-04-02 01:12:13,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:13,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344435954] [2023-04-02 01:12:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:13,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:13,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:13,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:12:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:13,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:13,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344435954] [2023-04-02 01:12:13,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344435954] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:12:13,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:12:13,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 01:12:13,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618400404] [2023-04-02 01:12:13,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:12:13,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 01:12:13,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:13,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 01:12:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:12:13,628 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:12:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:13,802 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2023-04-02 01:12:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 01:12:13,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-04-02 01:12:13,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:13,803 INFO L225 Difference]: With dead ends: 57 [2023-04-02 01:12:13,803 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 01:12:13,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:12:13,804 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:13,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 5 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:12:13,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 01:12:13,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-04-02 01:12:13,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:13,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-04-02 01:12:13,819 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 25 [2023-04-02 01:12:13,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:13,819 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-04-02 01:12:13,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:12:13,820 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-04-02 01:12:13,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 01:12:13,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:13,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:13,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 01:12:13,822 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:13,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:13,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1493794265, now seen corresponding path program 1 times [2023-04-02 01:12:13,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:13,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266530732] [2023-04-02 01:12:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:13,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:13,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:13,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:12:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:14,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:14,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266530732] [2023-04-02 01:12:14,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266530732] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:12:14,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359367484] [2023-04-02 01:12:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:14,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:14,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:14,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:12:14,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 01:12:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:14,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:12:14,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:12:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:14,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:12:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:14,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359367484] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:12:14,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:12:14,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2023-04-02 01:12:14,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175927490] [2023-04-02 01:12:14,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:12:14,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 01:12:14,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:14,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 01:12:14,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:12:14,449 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:12:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:14,814 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2023-04-02 01:12:14,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 01:12:14,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-04-02 01:12:14,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:14,815 INFO L225 Difference]: With dead ends: 57 [2023-04-02 01:12:14,816 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 01:12:14,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-04-02 01:12:14,817 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 86 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:14,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 11 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:12:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 01:12:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2023-04-02 01:12:14,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-04-02 01:12:14,824 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 25 [2023-04-02 01:12:14,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:14,824 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-04-02 01:12:14,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:12:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-04-02 01:12:14,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 01:12:14,825 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:14,826 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:14,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 01:12:15,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:15,032 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:15,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1293266367, now seen corresponding path program 1 times [2023-04-02 01:12:15,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:15,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918130558] [2023-04-02 01:12:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:15,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:15,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:15,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:12:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:15,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:15,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918130558] [2023-04-02 01:12:15,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918130558] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:12:15,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124023253] [2023-04-02 01:12:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:15,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:15,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:15,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:12:15,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 01:12:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:15,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 01:12:15,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:12:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:15,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:12:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:15,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124023253] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:12:15,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:12:15,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2023-04-02 01:12:15,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269762002] [2023-04-02 01:12:15,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:12:15,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 01:12:15,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 01:12:15,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:12:15,603 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 14 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:12:15,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:15,970 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2023-04-02 01:12:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 01:12:15,971 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-04-02 01:12:15,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:15,972 INFO L225 Difference]: With dead ends: 62 [2023-04-02 01:12:15,972 INFO L226 Difference]: Without dead ends: 45 [2023-04-02 01:12:15,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2023-04-02 01:12:15,973 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 89 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:15,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 13 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:12:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-02 01:12:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2023-04-02 01:12:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-04-02 01:12:15,979 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 30 [2023-04-02 01:12:15,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:15,980 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-04-02 01:12:15,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:12:15,980 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-04-02 01:12:15,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 01:12:15,981 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:15,981 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] [2023-04-02 01:12:15,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 01:12:16,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:16,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:16,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash -102367527, now seen corresponding path program 2 times [2023-04-02 01:12:16,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:16,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613356570] [2023-04-02 01:12:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:16,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:16,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:16,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:12:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:16,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:16,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613356570] [2023-04-02 01:12:16,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613356570] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:12:16,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801235290] [2023-04-02 01:12:16,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:12:16,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:16,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:16,533 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:12:16,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 01:12:16,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:12:16,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:12:16,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 01:12:16,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:12:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:16,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:12:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:16,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801235290] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:12:16,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:12:16,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 16 [2023-04-02 01:12:16,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128627612] [2023-04-02 01:12:16,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:12:16,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 01:12:16,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:16,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 01:12:16,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:12:16,956 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 16 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:12:17,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:17,387 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2023-04-02 01:12:17,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 01:12:17,388 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2023-04-02 01:12:17,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:17,388 INFO L225 Difference]: With dead ends: 67 [2023-04-02 01:12:17,389 INFO L226 Difference]: Without dead ends: 50 [2023-04-02 01:12:17,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2023-04-02 01:12:17,390 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 98 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:17,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 15 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:12:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-02 01:12:17,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-04-02 01:12:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-04-02 01:12:17,397 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 35 [2023-04-02 01:12:17,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:17,397 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-04-02 01:12:17,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:12:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-04-02 01:12:17,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 01:12:17,398 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:17,398 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:17,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 01:12:17,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:17,605 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:17,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:17,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1555460417, now seen corresponding path program 3 times [2023-04-02 01:12:17,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:17,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071924610] [2023-04-02 01:12:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:17,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:17,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:17,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:12:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:17,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:17,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071924610] [2023-04-02 01:12:17,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071924610] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:12:17,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48348923] [2023-04-02 01:12:17,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:12:17,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:17,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:17,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:12:18,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 01:12:19,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 01:12:19,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:12:19,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-02 01:12:19,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:12:19,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2023-04-02 01:12:19,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:12:19,425 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-04-02 01:12:19,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 38 [2023-04-02 01:12:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 01:12:19,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:12:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48348923] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:12:19,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 01:12:19,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 22 [2023-04-02 01:12:19,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036453990] [2023-04-02 01:12:19,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:12:19,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 01:12:19,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 01:12:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-04-02 01:12:19,599 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:12:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:19,951 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2023-04-02 01:12:19,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 01:12:19,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-04-02 01:12:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:19,953 INFO L225 Difference]: With dead ends: 75 [2023-04-02 01:12:19,953 INFO L226 Difference]: Without dead ends: 62 [2023-04-02 01:12:19,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2023-04-02 01:12:19,954 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:19,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 189 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:12:19,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-02 01:12:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2023-04-02 01:12:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2023-04-02 01:12:19,961 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 40 [2023-04-02 01:12:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:19,962 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2023-04-02 01:12:19,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:12:19,962 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2023-04-02 01:12:19,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 01:12:19,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:19,963 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:19,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 01:12:20,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:20,172 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:20,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1555462339, now seen corresponding path program 1 times [2023-04-02 01:12:20,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:20,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470593195] [2023-04-02 01:12:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:20,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:20,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:20,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:12:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:20,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:20,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470593195] [2023-04-02 01:12:20,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470593195] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:12:20,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256752597] [2023-04-02 01:12:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:20,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:20,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:20,473 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:12:20,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 01:12:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:20,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 01:12:20,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:12:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:20,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:12:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:20,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256752597] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:12:20,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:12:20,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 17 [2023-04-02 01:12:20,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294120329] [2023-04-02 01:12:20,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:12:20,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 01:12:20,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:20,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 01:12:20,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-04-02 01:12:20,993 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 17 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:21,441 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2023-04-02 01:12:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 01:12:21,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2023-04-02 01:12:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:21,443 INFO L225 Difference]: With dead ends: 82 [2023-04-02 01:12:21,443 INFO L226 Difference]: Without dead ends: 60 [2023-04-02 01:12:21,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2023-04-02 01:12:21,444 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 107 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:21,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 13 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:12:21,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-02 01:12:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2023-04-02 01:12:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2023-04-02 01:12:21,453 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 40 [2023-04-02 01:12:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:21,454 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2023-04-02 01:12:21,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:21,455 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2023-04-02 01:12:21,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 01:12:21,456 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:21,456 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:21,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 01:12:21,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:21,657 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:21,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:21,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1976911707, now seen corresponding path program 2 times [2023-04-02 01:12:21,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:21,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118590775] [2023-04-02 01:12:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:21,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:22,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:22,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:12:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:12:22,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:22,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118590775] [2023-04-02 01:12:22,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118590775] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:12:22,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359976239] [2023-04-02 01:12:22,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:12:22,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:22,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:22,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:12:22,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 01:12:23,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:12:23,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:12:23,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-02 01:12:23,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:12:23,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 01:12:23,259 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 01:12:23,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-04-02 01:12:23,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2023-04-02 01:12:23,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-02 01:12:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:12:23,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:12:23,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:12:23,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 61 [2023-04-02 01:12:23,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2023-04-02 01:12:23,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-02 01:12:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:12:23,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359976239] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:12:23,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:12:23,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2023-04-02 01:12:23,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872263829] [2023-04-02 01:12:23,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:12:23,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 01:12:23,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:23,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 01:12:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=442, Unknown=7, NotChecked=0, Total=506 [2023-04-02 01:12:23,724 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 19 states have internal predecessors, (52), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:12:24,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:24,781 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2023-04-02 01:12:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 01:12:24,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 19 states have internal predecessors, (52), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-04-02 01:12:24,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:24,782 INFO L225 Difference]: With dead ends: 70 [2023-04-02 01:12:24,782 INFO L226 Difference]: Without dead ends: 68 [2023-04-02 01:12:24,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=1057, Unknown=7, NotChecked=0, Total=1260 [2023-04-02 01:12:24,784 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:24,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 35 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 01:12:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-02 01:12:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2023-04-02 01:12:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 53 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2023-04-02 01:12:24,791 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 45 [2023-04-02 01:12:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:24,791 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2023-04-02 01:12:24,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 19 states have internal predecessors, (52), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:12:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2023-04-02 01:12:24,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 01:12:24,792 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:24,792 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:24,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 01:12:25,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:25,000 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:25,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:25,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1975062743, now seen corresponding path program 1 times [2023-04-02 01:12:25,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:25,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350986946] [2023-04-02 01:12:25,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:25,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:25,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:25,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:12:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:12:25,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:25,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350986946] [2023-04-02 01:12:25,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350986946] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:12:25,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278327606] [2023-04-02 01:12:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:25,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:25,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:25,898 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:12:25,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 01:12:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:26,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-02 01:12:26,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:12:26,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 01:12:26,236 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 01:12:26,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-04-02 01:12:26,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2023-04-02 01:12:26,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-04-02 01:12:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:12:26,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:12:26,581 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2365 (Array Int Int))) (= (select (select (store |c_#memory_int| c_dll_create_~head~0.base v_ArrVal_2365) c_dll_create_~new_head~0.base) c_dll_create_~new_head~0.offset) 0)) is different from false [2023-04-02 01:12:26,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:12:26,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 59 [2023-04-02 01:12:26,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:12:26,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 26 [2023-04-02 01:12:26,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-02 01:12:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 1 not checked. [2023-04-02 01:12:26,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278327606] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:12:26,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:12:26,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 24 [2023-04-02 01:12:26,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558159847] [2023-04-02 01:12:26,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:12:26,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 01:12:26,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:26,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 01:12:26,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=449, Unknown=1, NotChecked=42, Total=552 [2023-04-02 01:12:26,679 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 20 states have internal predecessors, (52), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:12:27,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:27,645 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2023-04-02 01:12:27,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 01:12:27,645 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 20 states have internal predecessors, (52), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-04-02 01:12:27,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:27,646 INFO L225 Difference]: With dead ends: 80 [2023-04-02 01:12:27,646 INFO L226 Difference]: Without dead ends: 64 [2023-04-02 01:12:27,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=1164, Unknown=1, NotChecked=72, Total=1482 [2023-04-02 01:12:27,647 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 14 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:27,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 25 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 476 Invalid, 6 Unknown, 61 Unchecked, 0.6s Time] [2023-04-02 01:12:27,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-02 01:12:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2023-04-02 01:12:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2023-04-02 01:12:27,654 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 45 [2023-04-02 01:12:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:27,655 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2023-04-02 01:12:27,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 20 states have internal predecessors, (52), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:12:27,655 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2023-04-02 01:12:27,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 01:12:27,655 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:27,655 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:27,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 01:12:27,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:27,863 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:27,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:27,864 INFO L85 PathProgramCache]: Analyzing trace with hash 90638010, now seen corresponding path program 1 times [2023-04-02 01:12:27,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:27,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830958965] [2023-04-02 01:12:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:27,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:28,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:28,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:12:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:12:28,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:28,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830958965] [2023-04-02 01:12:28,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830958965] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:12:28,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604719049] [2023-04-02 01:12:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:28,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:28,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:28,734 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) [2023-04-02 01:12:28,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 01:12:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:29,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-02 01:12:29,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:12:29,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 01:12:29,129 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 01:12:29,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-04-02 01:12:29,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 01:12:29,209 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-02 01:12:29,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-04-02 01:12:29,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-04-02 01:12:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:12:29,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:12:29,596 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2865 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_dll_create_~head~0.base v_ArrVal_2865) c_dll_create_~new_head~0.base) (+ c_dll_create_~new_head~0.offset 4)) 0))) is different from false [2023-04-02 01:12:29,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:12:29,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2023-04-02 01:12:29,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-04-02 01:12:29,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-04-02 01:12:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 1 not checked. [2023-04-02 01:12:29,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604719049] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:12:29,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:12:29,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2023-04-02 01:12:29,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738797256] [2023-04-02 01:12:29,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:12:29,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 01:12:29,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:29,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 01:12:29,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=913, Unknown=1, NotChecked=60, Total=1056 [2023-04-02 01:12:29,767 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 28 states have internal predecessors, (67), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:12:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:31,237 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2023-04-02 01:12:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 01:12:31,237 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 28 states have internal predecessors, (67), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2023-04-02 01:12:31,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:31,238 INFO L225 Difference]: With dead ends: 97 [2023-04-02 01:12:31,238 INFO L226 Difference]: Without dead ends: 57 [2023-04-02 01:12:31,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=323, Invalid=1936, Unknown=1, NotChecked=92, Total=2352 [2023-04-02 01:12:31,239 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 88 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:31,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 53 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 983 Invalid, 0 Unknown, 49 Unchecked, 0.9s Time] [2023-04-02 01:12:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-02 01:12:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-04-02 01:12:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:12:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2023-04-02 01:12:31,247 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 46 [2023-04-02 01:12:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:31,247 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2023-04-02 01:12:31,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 28 states have internal predecessors, (67), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:12:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2023-04-02 01:12:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 01:12:31,248 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:31,248 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:31,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 01:12:31,456 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,SelfDestructingSolverStorable10 [2023-04-02 01:12:31,456 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:31,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:31,456 INFO L85 PathProgramCache]: Analyzing trace with hash -461146708, now seen corresponding path program 1 times [2023-04-02 01:12:31,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:31,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692070892] [2023-04-02 01:12:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:31,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:32,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:32,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:12:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 39 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 01:12:33,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:33,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692070892] [2023-04-02 01:12:33,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692070892] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:12:33,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679715350] [2023-04-02 01:12:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:33,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:33,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:33,755 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) [2023-04-02 01:12:33,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 01:12:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:34,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 74 conjunts are in the unsatisfiable core [2023-04-02 01:12:34,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:12:34,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 01:12:34,174 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 01:12:34,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 01:12:34,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2023-04-02 01:12:34,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-02 01:12:34,369 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-04-02 01:12:34,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-04-02 01:12:34,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-02 01:12:34,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 01:12:34,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 01:12:34,455 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-02 01:12:34,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2023-04-02 01:12:34,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-04-02 01:12:34,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2023-04-02 01:12:34,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-04-02 01:12:34,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-02 01:12:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 39 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 01:12:34,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:12:35,220 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3375 (Array Int Int)) (v_ArrVal_3376 (Array Int Int)) (v_ArrVal_3378 Int)) (= (let ((.cse0 (+ c_dll_create_~new_head~0.offset 4))) (select (select (store |c_#memory_int| c_dll_create_~head~0.base (store (select |c_#memory_int| c_dll_create_~head~0.base) (+ c_dll_create_~head~0.offset 12) v_ArrVal_3378)) (select (select (store |c_#memory_$Pointer$.base| c_dll_create_~head~0.base v_ArrVal_3375) c_dll_create_~new_head~0.base) .cse0)) (+ 8 (select (select (store |c_#memory_$Pointer$.offset| c_dll_create_~head~0.base v_ArrVal_3376) c_dll_create_~new_head~0.base) .cse0)))) 0)) is different from false [2023-04-02 01:12:35,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:12:35,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 79 [2023-04-02 01:12:35,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 116 [2023-04-02 01:12:35,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2023-04-02 01:12:35,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:12:35,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 90 [2023-04-02 01:12:35,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2023-04-02 01:12:35,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2023-04-02 01:12:49,462 WARN L223 SmtUtils]: Spent 14.09s on a formula simplification. DAG size of input: 33 DAG size of output: 31 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:12:49,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:12:49,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 01:12:49,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:12:49,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 131 treesize of output 95 [2023-04-02 01:12:49,820 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 01:12:49,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:12:49,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2997 treesize of output 2837 [2023-04-02 01:12:49,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:12:49,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 185 [2023-04-02 01:12:49,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 80 [2023-04-02 01:12:49,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-04-02 01:12:49,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:12:49,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 98 [2023-04-02 01:12:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 39 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 2 not checked. [2023-04-02 01:12:50,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679715350] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:12:50,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:12:50,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 45 [2023-04-02 01:12:50,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278132367] [2023-04-02 01:12:50,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:12:50,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-04-02 01:12:50,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:50,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-04-02 01:12:50,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1730, Unknown=3, NotChecked=84, Total=1980 [2023-04-02 01:12:50,171 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 40 states have internal predecessors, (91), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:13:06,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:13:06,093 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2023-04-02 01:13:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 01:13:06,093 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 40 states have internal predecessors, (91), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-04-02 01:13:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:13:06,094 INFO L225 Difference]: With dead ends: 86 [2023-04-02 01:13:06,094 INFO L226 Difference]: Without dead ends: 73 [2023-04-02 01:13:06,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=466, Invalid=3553, Unknown=17, NotChecked=124, Total=4160 [2023-04-02 01:13:06,095 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 148 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 24 mSolverCounterUnsat, 55 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 55 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-02 01:13:06,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 43 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1073 Invalid, 55 Unknown, 76 Unchecked, 2.4s Time] [2023-04-02 01:13:06,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-02 01:13:06,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2023-04-02 01:13:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:13:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2023-04-02 01:13:06,107 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 51 [2023-04-02 01:13:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:13:06,107 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2023-04-02 01:13:06,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 40 states have internal predecessors, (91), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:13:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2023-04-02 01:13:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 01:13:06,108 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:13:06,108 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:13:06,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 01:13:06,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:13:06,309 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:13:06,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:13:06,309 INFO L85 PathProgramCache]: Analyzing trace with hash -461144786, now seen corresponding path program 1 times [2023-04-02 01:13:06,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:13:06,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517154386] [2023-04-02 01:13:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:13:06,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:13:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:13:07,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:13:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:13:07,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:13:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:13:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 01:13:08,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:13:08,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517154386] [2023-04-02 01:13:08,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517154386] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:13:08,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201806008] [2023-04-02 01:13:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:13:08,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:13:08,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:13:08,333 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) [2023-04-02 01:13:08,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 01:13:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:13:08,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 78 conjunts are in the unsatisfiable core [2023-04-02 01:13:08,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:13:08,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 01:13:08,708 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 01:13:08,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 01:13:08,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2023-04-02 01:13:08,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-02 01:13:08,895 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-04-02 01:13:08,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-04-02 01:13:08,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-02 01:13:08,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 01:13:08,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 01:13:08,983 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-02 01:13:08,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2023-04-02 01:13:08,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2023-04-02 01:13:09,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2023-04-02 01:13:09,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2023-04-02 01:13:09,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-02 01:13:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 01:13:09,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:13:10,404 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_dll_create_~head~0.base)) (.cse1 (+ c_dll_create_~head~0.offset 12)) (.cse3 (+ c_dll_create_~new_head~0.offset 4))) (and (forall ((v_ArrVal_3921 Int) (v_ArrVal_3922 (Array Int Int)) (v_ArrVal_3923 (Array Int Int))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.base| c_dll_create_~head~0.base v_ArrVal_3922) c_dll_create_~new_head~0.base) .cse3))) (or (= (select (select (store |c_#memory_int| c_dll_create_~head~0.base (store .cse0 .cse1 v_ArrVal_3921)) .cse2) (+ 16 (select (select (store |c_#memory_$Pointer$.offset| c_dll_create_~head~0.base v_ArrVal_3923) c_dll_create_~new_head~0.base) .cse3))) 0) (= .cse2 0)))) (forall ((v_ArrVal_3921 Int) (v_ArrVal_3922 (Array Int Int)) (v_ArrVal_3923 (Array Int Int))) (let ((.cse4 (select (select (store |c_#memory_$Pointer$.offset| c_dll_create_~head~0.base v_ArrVal_3923) c_dll_create_~new_head~0.base) .cse3))) (or (= (select (select (store |c_#memory_int| c_dll_create_~head~0.base (store .cse0 .cse1 v_ArrVal_3921)) (select (select (store |c_#memory_$Pointer$.base| c_dll_create_~head~0.base v_ArrVal_3922) c_dll_create_~new_head~0.base) .cse3)) (+ 16 .cse4)) 0) (= .cse4 0)))))) is different from false [2023-04-02 01:13:10,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:10,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 79 [2023-04-02 01:13:10,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 120 [2023-04-02 01:13:10,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2023-04-02 01:13:10,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:10,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 102 [2023-04-02 01:13:10,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:10,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 149 [2023-04-02 01:13:10,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2023-04-02 01:13:10,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:10,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 91 [2023-04-02 01:13:10,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:10,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 139 [2023-04-02 01:13:10,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2023-04-02 01:13:10,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:10,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 90 [2023-04-02 01:13:10,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:10,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 130 [2023-04-02 01:13:10,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2023-04-02 01:13:47,280 WARN L223 SmtUtils]: Spent 36.45s on a formula simplification. DAG size of input: 67 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:13:47,465 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:47,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 01:13:47,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:47,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 01:13:47,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:47,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 01:13:48,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:48,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 131 treesize of output 95 [2023-04-02 01:13:48,120 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 01:13:48,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:48,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 673 treesize of output 653 [2023-04-02 01:13:48,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:48,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 185 [2023-04-02 01:13:48,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 166 [2023-04-02 01:13:48,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-04-02 01:13:48,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:48,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 61 [2023-04-02 01:13:48,394 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:48,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 131 treesize of output 95 [2023-04-02 01:13:48,401 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 01:13:48,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:48,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 673 treesize of output 653 [2023-04-02 01:13:48,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:48,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 185 [2023-04-02 01:13:48,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 80 [2023-04-02 01:13:48,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-04-02 01:13:48,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:13:48,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 98 [2023-04-02 01:13:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 38 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 2 not checked. [2023-04-02 01:13:48,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201806008] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:13:48,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:13:48,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2023-04-02 01:13:48,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031165980] [2023-04-02 01:13:48,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:13:48,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 01:13:48,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:13:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 01:13:48,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2066, Unknown=3, NotChecked=92, Total=2352 [2023-04-02 01:13:48,899 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 44 states have internal predecessors, (98), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:13:59,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:13:59,374 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2023-04-02 01:13:59,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 01:13:59,375 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 44 states have internal predecessors, (98), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-04-02 01:13:59,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:13:59,375 INFO L225 Difference]: With dead ends: 75 [2023-04-02 01:13:59,375 INFO L226 Difference]: Without dead ends: 73 [2023-04-02 01:13:59,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=547, Invalid=4281, Unknown=6, NotChecked=136, Total=4970 [2023-04-02 01:13:59,377 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 107 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 23 mSolverCounterUnsat, 43 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 43 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:13:59,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 61 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1421 Invalid, 43 Unknown, 73 Unchecked, 3.6s Time] [2023-04-02 01:13:59,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-02 01:13:59,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2023-04-02 01:13:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:13:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2023-04-02 01:13:59,386 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 51 [2023-04-02 01:13:59,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:13:59,386 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2023-04-02 01:13:59,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 44 states have internal predecessors, (98), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:13:59,386 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2023-04-02 01:13:59,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 01:13:59,387 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:13:59,387 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:13:59,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-04-02 01:13:59,594 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,SelfDestructingSolverStorable12 [2023-04-02 01:13:59,595 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:13:59,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:13:59,595 INFO L85 PathProgramCache]: Analyzing trace with hash -462993750, now seen corresponding path program 1 times [2023-04-02 01:13:59,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:13:59,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413233394] [2023-04-02 01:13:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:13:59,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:13:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:00,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:14:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:00,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:14:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 41 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 01:14:01,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:14:01,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413233394] [2023-04-02 01:14:01,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413233394] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:14:01,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236255033] [2023-04-02 01:14:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:01,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:14:01,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:14:01,561 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:14:01,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 01:14:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:01,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 71 conjunts are in the unsatisfiable core [2023-04-02 01:14:01,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:14:01,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 01:14:01,993 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 01:14:01,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 01:14:02,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2023-04-02 01:14:02,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-02 01:14:02,180 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-04-02 01:14:02,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-04-02 01:14:02,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 01:14:02,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-02 01:14:02,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 01:14:02,265 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-02 01:14:02,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2023-04-02 01:14:02,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-04-02 01:14:02,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2023-04-02 01:14:02,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-04-02 01:14:02,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-02 01:14:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 41 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 01:14:02,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:14:03,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:03,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 77 [2023-04-02 01:14:03,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 112 [2023-04-02 01:14:03,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2023-04-02 01:14:03,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:03,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 86 [2023-04-02 01:14:03,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 118 [2023-04-02 01:14:03,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2023-04-02 01:14:03,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:03,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 62 [2023-04-02 01:14:03,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 52 [2023-04-02 01:14:03,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2023-04-02 01:14:03,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-04-02 01:14:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 41 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 01:14:04,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236255033] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:14:04,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:14:04,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 45 [2023-04-02 01:14:04,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598325989] [2023-04-02 01:14:04,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:14:04,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-04-02 01:14:04,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:14:04,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-04-02 01:14:04,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1793, Unknown=19, NotChecked=0, Total=1980 [2023-04-02 01:14:04,028 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 40 states have internal predecessors, (90), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:14:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:14:06,688 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2023-04-02 01:14:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 01:14:06,688 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 40 states have internal predecessors, (90), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-04-02 01:14:06,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:14:06,689 INFO L225 Difference]: With dead ends: 86 [2023-04-02 01:14:06,689 INFO L226 Difference]: Without dead ends: 70 [2023-04-02 01:14:06,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=470, Invalid=3542, Unknown=20, NotChecked=0, Total=4032 [2023-04-02 01:14:06,691 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 122 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 24 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:14:06,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 43 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1066 Invalid, 27 Unknown, 0 Unchecked, 1.6s Time] [2023-04-02 01:14:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-02 01:14:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2023-04-02 01:14:06,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:14:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2023-04-02 01:14:06,697 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 51 [2023-04-02 01:14:06,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:14:06,698 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2023-04-02 01:14:06,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 40 states have internal predecessors, (90), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:14:06,698 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2023-04-02 01:14:06,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 01:14:06,698 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:14:06,698 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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] [2023-04-02 01:14:06,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-04-02 01:14:06,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-02 01:14:06,899 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:14:06,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:14:06,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1820298055, now seen corresponding path program 1 times [2023-04-02 01:14:06,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:14:06,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285456372] [2023-04-02 01:14:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:06,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:14:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:07,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:14:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:07,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:14:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 01:14:08,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:14:08,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285456372] [2023-04-02 01:14:08,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285456372] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:14:08,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858301099] [2023-04-02 01:14:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:08,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:14:08,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:14:08,629 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:14:08,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 01:14:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:09,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 72 conjunts are in the unsatisfiable core [2023-04-02 01:14:09,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:14:09,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 01:14:09,095 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 01:14:09,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 01:14:09,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 01:14:09,211 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-02 01:14:09,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-04-02 01:14:09,319 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-04-02 01:14:09,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-04-02 01:14:09,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 01:14:09,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 17 [2023-04-02 01:14:09,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2023-04-02 01:14:09,441 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-02 01:14:09,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 43 [2023-04-02 01:14:09,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:14:09,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-04-02 01:14:09,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-02 01:14:09,840 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 01:14:09,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 26 [2023-04-02 01:14:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 01:14:09,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:14:10,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:10,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 89 [2023-04-02 01:14:10,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:10,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 78 [2023-04-02 01:14:10,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 115 [2023-04-02 01:14:10,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 106 [2023-04-02 01:14:16,577 WARN L223 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 39 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:14:16,636 INFO L321 Elim1Store]: treesize reduction 33, result has 53.5 percent of original size [2023-04-02 01:14:16,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 67 treesize of output 91 [2023-04-02 01:14:16,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:16,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2023-04-02 01:14:21,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:21,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 79 [2023-04-02 01:14:21,520 INFO L321 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2023-04-02 01:14:21,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 34507 treesize of output 33646 [2023-04-02 01:14:21,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:21,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1048 treesize of output 920 [2023-04-02 01:14:21,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:21,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 175 [2023-04-02 01:14:22,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2023-04-02 01:14:22,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:22,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2023-04-02 01:14:22,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:14:22,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2023-04-02 01:14:22,134 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 01:14:22,146 INFO L321 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2023-04-02 01:14:22,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2023-04-02 01:14:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 01:14:22,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858301099] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:14:22,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:14:22,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 50 [2023-04-02 01:14:22,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209630945] [2023-04-02 01:14:22,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:14:22,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-02 01:14:22,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:14:22,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-02 01:14:22,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2303, Unknown=6, NotChecked=0, Total=2450 [2023-04-02 01:14:22,486 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 45 states have internal predecessors, (100), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:14:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:14:26,067 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2023-04-02 01:14:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 01:14:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 45 states have internal predecessors, (100), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2023-04-02 01:14:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:14:26,067 INFO L225 Difference]: With dead ends: 70 [2023-04-02 01:14:26,068 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 01:14:26,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=503, Invalid=4183, Unknown=6, NotChecked=0, Total=4692 [2023-04-02 01:14:26,069 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 125 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:14:26,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 75 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1814 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-02 01:14:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 01:14:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-04-02 01:14:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:14:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-04-02 01:14:26,077 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 52 [2023-04-02 01:14:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:14:26,077 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-04-02 01:14:26,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 45 states have internal predecessors, (100), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:14:26,078 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-04-02 01:14:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 01:14:26,078 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:14:26,078 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:14:26,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 01:14:26,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 01:14:26,279 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:14:26,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:14:26,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1555611967, now seen corresponding path program 2 times [2023-04-02 01:14:26,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:14:26,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545689927] [2023-04-02 01:14:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:14:26,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:14:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:28,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:14:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:28,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:14:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:14:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 38 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:14:29,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:14:29,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545689927] [2023-04-02 01:14:29,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545689927] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:14:29,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087942897] [2023-04-02 01:14:29,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:14:29,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:14:29,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:14:29,659 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:14:29,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 01:14:30,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:14:30,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:14:30,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 110 conjunts are in the unsatisfiable core [2023-04-02 01:14:30,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:14:30,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 01:14:30,101 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 01:14:30,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 01:14:30,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2023-04-02 01:14:30,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-02 01:14:30,339 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-04-02 01:14:30,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-04-02 01:14:30,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-02 01:14:30,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 01:14:30,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 01:14:30,594 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-02 01:14:30,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 67 [2023-04-02 01:14:30,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2023-04-02 01:14:30,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-04-02 01:14:30,812 INFO L321 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2023-04-02 01:14:30,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2023-04-02 01:14:30,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 17 [2023-04-02 01:14:30,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-04-02 01:14:30,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-04-02 01:14:30,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 17 [2023-04-02 01:14:30,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-02 01:14:30,938 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-02 01:14:30,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 64 [2023-04-02 01:14:30,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:14:30,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-04-02 01:14:30,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-02 01:14:31,467 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 01:14:31,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 33 [2023-04-02 01:14:31,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-02 01:14:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 38 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:14:31,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:14:34,344 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5552 (Array Int Int)) (v_ArrVal_5549 Int) (v_ArrVal_5551 Int)) (= (let ((.cse5 (+ c_dll_create_~head~0.offset 12))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| c_dll_create_~head~0.base (store (select |c_#memory_$Pointer$.offset| c_dll_create_~head~0.base) .cse5 v_ArrVal_5551))) (.cse0 (store |c_#memory_$Pointer$.base| c_dll_create_~head~0.base (store (select |c_#memory_$Pointer$.base| c_dll_create_~head~0.base) .cse5 v_ArrVal_5549))) (.cse4 (+ c_dll_create_~new_head~0.offset 4))) (let ((.cse1 (select (select .cse0 c_dll_create_~new_head~0.base) .cse4)) (.cse2 (+ (select (select .cse3 c_dll_create_~new_head~0.base) .cse4) 4))) (select (select (store |c_#memory_int| c_dll_create_~head~0.base v_ArrVal_5552) (select (select .cse0 .cse1) .cse2)) (+ (select (select .cse3 .cse1) .cse2) 8))))) 0)) is different from false [2023-04-02 01:14:34,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:34,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 267 treesize of output 224 [2023-04-02 01:14:34,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:34,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 207 treesize of output 164 [2023-04-02 01:14:34,397 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5552 (Array Int Int)) (v_ArrVal_5549 Int) (v_arrayElimArr_28 (Array Int Int)) (v_ArrVal_5547 (Array Int Int)) (v_arrayElimArr_29 (Array Int Int)) (v_ArrVal_5551 Int)) (let ((.cse4 (+ c_dll_create_~new_head~0.offset 4))) (or (= (let ((.cse6 (+ c_dll_create_~head~0.offset 12))) (let ((.cse3 (let ((.cse7 (store |c_#memory_$Pointer$.offset| c_dll_create_~new_head~0.base v_arrayElimArr_29))) (store .cse7 c_dll_create_~head~0.base (store (select .cse7 c_dll_create_~head~0.base) .cse6 v_ArrVal_5551)))) (.cse0 (let ((.cse5 (store |c_#memory_$Pointer$.base| c_dll_create_~new_head~0.base v_arrayElimArr_28))) (store .cse5 c_dll_create_~head~0.base (store (select .cse5 c_dll_create_~head~0.base) .cse6 v_ArrVal_5549))))) (let ((.cse1 (select (select .cse0 c_dll_create_~new_head~0.base) .cse4)) (.cse2 (+ (select (select .cse3 c_dll_create_~new_head~0.base) .cse4) 4))) (select (select (store (store |c_#memory_int| c_dll_create_~new_head~0.base v_ArrVal_5547) c_dll_create_~head~0.base v_ArrVal_5552) (select (select .cse0 .cse1) .cse2)) (+ (select (select .cse3 .cse1) .cse2) 8))))) 0) (not (= c_dll_create_~head~0.base (select v_arrayElimArr_28 .cse4))) (not (= c_dll_create_~head~0.offset (select v_arrayElimArr_29 .cse4)))))) is different from false [2023-04-02 01:14:34,831 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5552 (Array Int Int)) (v_ArrVal_5532 (Array Int Int)) (v_ArrVal_5549 Int) (v_arrayElimArr_28 (Array Int Int)) (v_ArrVal_5533 (Array Int Int)) (v_ArrVal_5534 Int) (v_ArrVal_5547 (Array Int Int)) (v_arrayElimArr_29 (Array Int Int)) (v_dll_create_~new_head~0.base_117 Int) (v_ArrVal_5551 Int)) (let ((.cse0 (select v_arrayElimArr_28 4))) (or (not (= (select v_arrayElimArr_29 4) c_dll_create_~new_head~0.offset)) (not (= c_dll_create_~new_head~0.base .cse0)) (= (let ((.cse6 (+ c_dll_create_~new_head~0.offset 12))) (let ((.cse4 (let ((.cse7 (store (store |c_#memory_$Pointer$.offset| c_dll_create_~head~0.base v_ArrVal_5533) v_dll_create_~new_head~0.base_117 v_arrayElimArr_29))) (store .cse7 .cse0 (store (select .cse7 .cse0) .cse6 v_ArrVal_5551)))) (.cse1 (let ((.cse5 (store (store |c_#memory_$Pointer$.base| c_dll_create_~head~0.base v_ArrVal_5532) v_dll_create_~new_head~0.base_117 v_arrayElimArr_28))) (store .cse5 .cse0 (store (select .cse5 .cse0) .cse6 v_ArrVal_5549))))) (let ((.cse2 (select (select .cse1 v_dll_create_~new_head~0.base_117) 4)) (.cse3 (+ (select (select .cse4 v_dll_create_~new_head~0.base_117) 4) 4))) (select (select (store (store (store |c_#memory_int| c_dll_create_~head~0.base (store (select |c_#memory_int| c_dll_create_~head~0.base) (+ c_dll_create_~head~0.offset 12) v_ArrVal_5534)) v_dll_create_~new_head~0.base_117 v_ArrVal_5547) .cse0 v_ArrVal_5552) (select (select .cse1 .cse2) .cse3)) (+ (select (select .cse4 .cse2) .cse3) 8))))) 0) (not (= 0 (select |c_#valid| v_dll_create_~new_head~0.base_117)))))) is different from false [2023-04-02 01:14:34,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:34,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 397 treesize of output 328 [2023-04-02 01:14:34,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:34,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 307 treesize of output 238 [2023-04-02 01:14:34,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:34,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41364 treesize of output 40314 [2023-04-02 01:14:35,159 INFO L321 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2023-04-02 01:14:35,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 253259 treesize of output 239500 [2023-04-02 01:14:35,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:35,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2436 treesize of output 2181 [2023-04-02 01:14:35,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:35,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 2199 treesize of output 2115 [2023-04-02 01:14:35,865 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:35,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1420 treesize of output 1428 [2023-04-02 01:14:35,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:35,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1340 treesize of output 1336 [2023-04-02 01:14:36,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 215 [2023-04-02 01:14:36,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-04-02 01:14:36,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:36,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1011 treesize of output 1003 [2023-04-02 01:14:36,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:14:36,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 995 treesize of output 1005 [2023-04-02 01:15:24,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-02 01:15:24,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3