/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/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:12:17,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:12:17,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:12:17,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 01:12:17,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 01:12:17,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 01:12:17,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 01:12:17,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 01:12:17,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 01:12:17,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 01:12:17,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 01:12:17,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 01:12:17,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:12:17,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:12:17,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:12:17,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:12:17,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:12:17,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:12:17,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:12:17,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:12:17,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:12:17,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:12:17,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:12:17,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:12:17,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 01:12:17,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 01:12:17,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 01:12:17,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 01:12:17,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 01:12:17,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 01:12:17,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 01:12:17,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 01:12:17,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 01:12:17,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 01:12:17,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 01:12:17,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 01:12:17,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 01:12:17,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 01:12:17,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:12:17,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:12:17,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:12:17,582 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 01:12:17,610 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:12:17,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:12:17,610 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:12:17,610 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:12:17,612 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:12:17,612 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:12:17,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:12:17,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:12:17,613 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:12:17,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:12:17,614 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:12:17,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:12:17,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:12:17,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:12:17,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:12:17,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:12:17,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:12:17,615 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:12:17,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:12:17,615 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:12:17,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:12:17,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:12:17,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:12:17,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:12:17,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:12:17,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:12:17,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:12:17,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:12:17,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:12:17,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:12:17,617 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:12:17,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:12:17,617 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:12:17,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:12:17,617 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:12:17,617 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:12:17,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:12:17,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:12:17,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:12:17,864 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:12:17,865 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:12:17,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2023-04-02 01:12:19,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:12:19,335 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:12:19,336 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2023-04-02 01:12:19,345 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c89b73e9a/ff4c8dd9602e460e98de03b68577ac62/FLAGbb991b352 [2023-04-02 01:12:19,356 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c89b73e9a/ff4c8dd9602e460e98de03b68577ac62 [2023-04-02 01:12:19,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:12:19,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:12:19,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:12:19,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:12:19,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:12:19,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:12:19" (1/1) ... [2023-04-02 01:12:19,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58dd3460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:19, skipping insertion in model container [2023-04-02 01:12:19,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:12:19" (1/1) ... [2023-04-02 01:12:19,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:12:19,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:12:19,690 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/sll_length_check-1.i[23818,23831] [2023-04-02 01:12:19,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:12:19,706 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:12:19,754 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/sll_length_check-1.i[23818,23831] [2023-04-02 01:12:19,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:12:19,780 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:12:19,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:19 WrapperNode [2023-04-02 01:12:19,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:12:19,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:12:19,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:12:19,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:12:19,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:19" (1/1) ... [2023-04-02 01:12:19,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:19" (1/1) ... [2023-04-02 01:12:19,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:19" (1/1) ... [2023-04-02 01:12:19,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:19" (1/1) ... [2023-04-02 01:12:19,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:19" (1/1) ... [2023-04-02 01:12:19,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:19" (1/1) ... [2023-04-02 01:12:19,836 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:19" (1/1) ... [2023-04-02 01:12:19,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:19" (1/1) ... [2023-04-02 01:12:19,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:12:19,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:12:19,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:12:19,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:12:19,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:19" (1/1) ... [2023-04-02 01:12:19,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:12:19,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:19,894 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 01:12:19,903 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 01:12:19,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:12:19,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:12:19,933 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:12:19,933 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-02 01:12:19,934 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-02 01:12:19,934 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-02 01:12:19,934 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2023-04-02 01:12:19,934 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2023-04-02 01:12:19,935 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2023-04-02 01:12:19,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:12:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:12:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:12:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 01:12:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 01:12:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:12:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:12:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 01:12:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-02 01:12:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-02 01:12:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-02 01:12:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-02 01:12:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-02 01:12:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-02 01:12:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-02 01:12:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-02 01:12:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-02 01:12:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-02 01:12:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-02 01:12:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-02 01:12:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-02 01:12:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-02 01:12:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-02 01:12:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-02 01:12:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-02 01:12:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-02 01:12:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-02 01:12:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-02 01:12:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-02 01:12:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-02 01:12:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-02 01:12:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-02 01:12:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-02 01:12:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-02 01:12:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-02 01:12:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-02 01:12:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-02 01:12:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-02 01:12:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-02 01:12:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-02 01:12:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-02 01:12:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-02 01:12:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-02 01:12:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-02 01:12:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-02 01:12:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-02 01:12:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-02 01:12:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-02 01:12:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-02 01:12:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-02 01:12:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-02 01:12:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-02 01:12:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-02 01:12:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-02 01:12:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-02 01:12:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-02 01:12:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-02 01:12:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-02 01:12:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-02 01:12:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-02 01:12:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 01:12:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 01:12:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-02 01:12:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 01:12:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-02 01:12:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-02 01:12:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-02 01:12:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-02 01:12:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-02 01:12:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-02 01:12:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-02 01:12:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-02 01:12:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 01:12:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-02 01:12:19,948 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-02 01:12:19,948 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-02 01:12:19,948 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-02 01:12:19,948 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-02 01:12:19,948 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-02 01:12:19,948 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-02 01:12:19,948 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-02 01:12:19,948 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-02 01:12:19,948 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-02 01:12:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-02 01:12:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-02 01:12:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-02 01:12:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-02 01:12:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-02 01:12:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-02 01:12:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-02 01:12:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-02 01:12:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-02 01:12:19,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-02 01:12:19,950 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-02 01:12:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-02 01:12:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-02 01:12:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-02 01:12:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-02 01:12:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-02 01:12:19,953 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-02 01:12:19,953 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-02 01:12:19,953 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-02 01:12:19,953 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-02 01:12:19,953 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-02 01:12:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-02 01:12:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-02 01:12:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-02 01:12:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-02 01:12:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-02 01:12:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-02 01:12:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-02 01:12:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-02 01:12:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-02 01:12:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2023-04-02 01:12:19,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 01:12:19,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 01:12:19,957 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2023-04-02 01:12:19,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 01:12:19,958 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2023-04-02 01:12:19,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:12:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:12:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:12:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:12:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:12:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:12:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:12:20,275 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:12:20,278 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:12:20,310 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-02 01:12:20,420 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:12:20,426 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:12:20,426 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-02 01:12:20,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:12:20 BoogieIcfgContainer [2023-04-02 01:12:20,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:12:20,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:12:20,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:12:20,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:12:20,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:12:19" (1/3) ... [2023-04-02 01:12:20,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a41592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:12:20, skipping insertion in model container [2023-04-02 01:12:20,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:12:19" (2/3) ... [2023-04-02 01:12:20,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a41592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:12:20, skipping insertion in model container [2023-04-02 01:12:20,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:12:20" (3/3) ... [2023-04-02 01:12:20,436 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2023-04-02 01:12:20,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:12:20,453 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:12:20,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:12:20,504 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;@4c70453e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:12:20,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:12:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 01:12:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 01:12:20,519 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:20,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:20,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:20,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1979950829, now seen corresponding path program 1 times [2023-04-02 01:12:20,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:20,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288247696] [2023-04-02 01:12:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:20,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:20,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:20,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:12:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:20,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-02 01:12:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:20,787 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 01:12:20,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:20,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288247696] [2023-04-02 01:12:20,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288247696] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:12:20,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:12:20,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:12:20,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110869194] [2023-04-02 01:12:20,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:12:20,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:12:20,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:20,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:12:20,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:12:20,827 INFO L87 Difference]: Start difference. First operand has 41 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:12:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:21,064 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2023-04-02 01:12:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 01:12:21,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-04-02 01:12:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:21,073 INFO L225 Difference]: With dead ends: 90 [2023-04-02 01:12:21,073 INFO L226 Difference]: Without dead ends: 38 [2023-04-02 01:12:21,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 01:12:21,078 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 78 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:21,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 7 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:12:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-02 01:12:21,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2023-04-02 01:12:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:12:21,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-04-02 01:12:21,124 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2023-04-02 01:12:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:21,124 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-04-02 01:12:21,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:12:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-04-02 01:12:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 01:12:21,125 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:21,125 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 01:12:21,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:12:21,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:21,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:21,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1024648154, now seen corresponding path program 1 times [2023-04-02 01:12:21,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:21,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436950685] [2023-04-02 01:12:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:21,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:21,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:21,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-02 01:12:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:21,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-04-02 01:12:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:21,439 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 01:12:21,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:21,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436950685] [2023-04-02 01:12:21,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436950685] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:12:21,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:12:21,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 01:12:21,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399971809] [2023-04-02 01:12:21,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:12:21,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 01:12:21,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:21,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 01:12:21,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 01:12:21,442 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:12:21,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:21,688 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2023-04-02 01:12:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 01:12:21,689 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 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 01:12:21,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:21,692 INFO L225 Difference]: With dead ends: 61 [2023-04-02 01:12:21,692 INFO L226 Difference]: Without dead ends: 50 [2023-04-02 01:12:21,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 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 01:12:21,700 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 78 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:21,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 9 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:12:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-02 01:12:21,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2023-04-02 01:12:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-02 01:12:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-04-02 01:12:21,725 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2023-04-02 01:12:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:21,726 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-04-02 01:12:21,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:12:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-04-02 01:12:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 01:12:21,734 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:21,735 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, 1, 1, 1] [2023-04-02 01:12:21,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:12:21,735 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:21,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:21,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1805063294, now seen corresponding path program 1 times [2023-04-02 01:12:21,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:21,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925458247] [2023-04-02 01:12:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:21,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:21,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:21,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-02 01:12:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:21,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-02 01:12:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:21,998 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 01:12:21,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:21,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925458247] [2023-04-02 01:12:21,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925458247] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:12:22,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:12:22,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-02 01:12:22,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124858961] [2023-04-02 01:12:22,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:12:22,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 01:12:22,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:22,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 01:12:22,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-04-02 01:12:22,003 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:12:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:22,392 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-04-02 01:12:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 01:12:22,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-04-02 01:12:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:22,395 INFO L225 Difference]: With dead ends: 52 [2023-04-02 01:12:22,395 INFO L226 Difference]: Without dead ends: 48 [2023-04-02 01:12:22,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-04-02 01:12:22,401 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 73 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:22,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 17 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:12:22,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-02 01:12:22,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2023-04-02 01:12:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-02 01:12:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2023-04-02 01:12:22,425 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 28 [2023-04-02 01:12:22,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:22,426 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2023-04-02 01:12:22,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:12:22,426 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2023-04-02 01:12:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 01:12:22,428 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:22,428 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:22,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 01:12:22,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:22,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:22,429 INFO L85 PathProgramCache]: Analyzing trace with hash 988424277, now seen corresponding path program 1 times [2023-04-02 01:12:22,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:22,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634546262] [2023-04-02 01:12:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:22,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:22,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:22,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:12:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:22,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-02 01:12:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:22,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:22,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634546262] [2023-04-02 01:12:22,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634546262] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:12:22,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111187749] [2023-04-02 01:12:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:22,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:22,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:22,581 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 01:12:22,592 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 01:12:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:22,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:12:22,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:12:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:22,799 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:12:22,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111187749] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:12:22,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 01:12:22,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2023-04-02 01:12:22,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484745006] [2023-04-02 01:12:22,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:12:22,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:12:22,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:22,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:12:22,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-04-02 01:12:22,801 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:12:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:22,844 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2023-04-02 01:12:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:12:22,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-04-02 01:12:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:22,845 INFO L225 Difference]: With dead ends: 63 [2023-04-02 01:12:22,845 INFO L226 Difference]: Without dead ends: 42 [2023-04-02 01:12:22,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-02 01:12:22,846 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 16 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:22,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 122 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:12:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-02 01:12:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2023-04-02 01:12:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 01:12:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-02 01:12:22,853 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 28 [2023-04-02 01:12:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:22,853 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-02 01:12:22,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:12:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-02 01:12:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 01:12:22,854 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:22,854 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, 1, 1, 1, 1] [2023-04-02 01:12:22,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 01:12:23,059 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 01:12:23,060 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:23,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:23,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2054441631, now seen corresponding path program 1 times [2023-04-02 01:12:23,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:23,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339498763] [2023-04-02 01:12:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:23,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:23,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:23,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-02 01:12:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:23,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-02 01:12:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:12:23,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:23,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339498763] [2023-04-02 01:12:23,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339498763] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:12:23,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715359126] [2023-04-02 01:12:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:23,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:23,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:23,230 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 01:12:23,233 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 01:12:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:23,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:12:23,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:12:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:12:23,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:12:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:12:23,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715359126] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:12:23,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:12:23,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2023-04-02 01:12:23,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638876255] [2023-04-02 01:12:23,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:12:23,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 01:12:23,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:23,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 01:12:23,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-02 01:12:23,542 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 01:12:23,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:23,791 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2023-04-02 01:12:23,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 01:12:23,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2023-04-02 01:12:23,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:23,794 INFO L225 Difference]: With dead ends: 60 [2023-04-02 01:12:23,794 INFO L226 Difference]: Without dead ends: 45 [2023-04-02 01:12:23,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-04-02 01:12:23,795 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:23,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 9 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:12:23,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-02 01:12:23,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2023-04-02 01:12:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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 01:12:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2023-04-02 01:12:23,806 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2023-04-02 01:12:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:23,808 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2023-04-02 01:12:23,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 01:12:23,809 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2023-04-02 01:12:23,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 01:12:23,811 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:23,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:23,825 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 01:12:24,022 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 01:12:24,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:24,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1952942403, now seen corresponding path program 2 times [2023-04-02 01:12:24,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:24,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413240362] [2023-04-02 01:12:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:24,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:24,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:24,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-02 01:12:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:24,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:12:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:12:24,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:24,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413240362] [2023-04-02 01:12:24,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413240362] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:12:24,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931467149] [2023-04-02 01:12:24,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:12:24,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:24,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:24,369 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 01:12:24,391 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 01:12:24,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:12:24,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:12:24,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 01:12:24,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:12:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:12:24,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:12:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:12:24,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931467149] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:12:24,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:12:24,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 21 [2023-04-02 01:12:24,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28443966] [2023-04-02 01:12:24,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:12:24,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 01:12:24,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:24,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 01:12:24,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-04-02 01:12:24,779 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 21 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 01:12:25,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:25,312 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-04-02 01:12:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 01:12:25,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2023-04-02 01:12:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:25,345 INFO L225 Difference]: With dead ends: 57 [2023-04-02 01:12:25,345 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 01:12:25,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 01:12:25,346 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 101 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:25,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 29 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:12:25,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 01:12:25,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2023-04-02 01:12:25,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 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 01:12:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-04-02 01:12:25,355 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2023-04-02 01:12:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:25,355 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-04-02 01:12:25,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 01:12:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-04-02 01:12:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 01:12:25,356 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:25,356 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:25,367 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 01:12:25,562 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 01:12:25,563 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:25,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:25,563 INFO L85 PathProgramCache]: Analyzing trace with hash 958547170, now seen corresponding path program 3 times [2023-04-02 01:12:25,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:25,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85232350] [2023-04-02 01:12:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:25,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:25,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:12:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:25,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-02 01:12:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:25,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-02 01:12:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:12:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:12:25,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:12:25,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85232350] [2023-04-02 01:12:25,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85232350] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:12:25,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525303] [2023-04-02 01:12:25,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:12:25,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:12:25,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:12:25,753 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 01:12:25,755 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 01:12:25,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 01:12:25,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:12:25,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 01:12:25,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:12:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:12:25,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:12:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:12:26,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525303] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:12:26,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:12:26,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 11 [2023-04-02 01:12:26,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025520260] [2023-04-02 01:12:26,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:12:26,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 01:12:26,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:12:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 01:12:26,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-04-02 01:12:26,005 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:12:26,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:12:26,302 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2023-04-02 01:12:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 01:12:26,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-04-02 01:12:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:12:26,303 INFO L225 Difference]: With dead ends: 55 [2023-04-02 01:12:26,303 INFO L226 Difference]: Without dead ends: 51 [2023-04-02 01:12:26,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-04-02 01:12:26,304 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:12:26,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 17 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:12:26,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-02 01:12:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2023-04-02 01:12:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 01:12:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2023-04-02 01:12:26,312 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36 [2023-04-02 01:12:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:12:26,313 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2023-04-02 01:12:26,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:12:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2023-04-02 01:12:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-02 01:12:26,314 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:12:26,314 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:12:26,322 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 01:12:26,520 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 01:12:26,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:12:26,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:12:26,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2013104129, now seen corresponding path program 4 times [2023-04-02 01:12:26,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:12:26,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815689245] [2023-04-02 01:12:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:12:26,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:12:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 01:12:26,542 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 01:12:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 01:12:26,579 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-04-02 01:12:26,579 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 01:12:26,580 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 01:12:26,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 01:12:26,585 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2023-04-02 01:12:26,587 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 01:12:26,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 01:12:26 BoogieIcfgContainer [2023-04-02 01:12:26,621 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 01:12:26,621 INFO L158 Benchmark]: Toolchain (without parser) took 7262.33ms. Allocated memory was 244.3MB in the beginning and 293.6MB in the end (delta: 49.3MB). Free memory was 194.8MB in the beginning and 154.5MB in the end (delta: 40.4MB). Peak memory consumption was 90.2MB. Max. memory is 8.0GB. [2023-04-02 01:12:26,622 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 194.0MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 01:12:26,622 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.54ms. Allocated memory is still 244.3MB. Free memory was 194.8MB in the beginning and 178.0MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-04-02 01:12:26,622 INFO L158 Benchmark]: Boogie Preprocessor took 60.69ms. Allocated memory is still 244.3MB. Free memory was 178.0MB in the beginning and 175.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 01:12:26,622 INFO L158 Benchmark]: RCFGBuilder took 585.26ms. Allocated memory is still 244.3MB. Free memory was 175.4MB in the beginning and 154.5MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2023-04-02 01:12:26,623 INFO L158 Benchmark]: TraceAbstraction took 6190.51ms. Allocated memory was 244.3MB in the beginning and 293.6MB in the end (delta: 49.3MB). Free memory was 153.9MB in the beginning and 154.5MB in the end (delta: -526.3kB). Peak memory consumption was 49.3MB. Max. memory is 8.0GB. [2023-04-02 01:12:26,624 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 194.0MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 420.54ms. Allocated memory is still 244.3MB. Free memory was 194.8MB in the beginning and 178.0MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 60.69ms. Allocated memory is still 244.3MB. Free memory was 178.0MB in the beginning and 175.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 585.26ms. Allocated memory is still 244.3MB. Free memory was 175.4MB in the beginning and 154.5MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 6190.51ms. Allocated memory was 244.3MB in the beginning and 293.6MB in the end (delta: 49.3MB). Free memory was 153.9MB in the beginning and 154.5MB in the end (delta: -526.3kB). Peak memory consumption was 49.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 613]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L603] int len = 2; VAL [len=2] [L604] len < 32 && __VERIFIER_nondet_int() [L604] len < 32 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, len < 32 && __VERIFIER_nondet_int()=0, len=2] [L604] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L607] CALL, EXPR sll_create(len + 1) VAL [\old(len)=3] [L575] SLL head = ((void *)0); VAL [\old(len)=3, head={0:0}, len=3] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={0:0}, len=3, new_head={-1:0}] [L581] new_head->next = head [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-1:0}, len=2, new_head={-1:0}] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-1:0}, len=2, new_head={-2:0}] [L581] new_head->next = head [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-2:0}, len=1, new_head={-2:0}] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-2:0}, len=1, new_head={-3:0}] [L581] new_head->next = head [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-3:0}, len=0, new_head={-3:0}] [L576] COND FALSE !(len > 0) VAL [\old(len)=3, head={-3:0}, len=0, new_head={-3:0}] [L585] return head; VAL [\old(len)=3, \result={-3:0}, head={-3:0}, len=0, new_head={-3:0}] [L607] RET, EXPR sll_create(len + 1) VAL [len=2, sll_create(len + 1)={-3:0}] [L607] SLL s = sll_create(len + 1); [L608] CALL, EXPR sll_length(s) VAL [head={-3:0}] [L588] int len = 0; VAL [head={-3:0}, head={-3:0}, len=0] [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND FALSE !(\read(head)) VAL [head={-3:0}, head={0:0}, len=3] [L593] return len; VAL [\result=3, head={-3:0}, head={0:0}, len=3] [L608] RET, EXPR sll_length(s) VAL [len=2, s={-3:0}, sll_length(s)=3] [L608] COND TRUE len != sll_length(s) [L613] reach_error() VAL [len=2, s={-3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.1s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 514 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 504 mSDsluCounter, 210 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 155 mSDsCounter, 111 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1461 IncrementalHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 111 mSolverCounterUnsat, 55 mSDtfsCounter, 1461 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 359 GetRequests, 240 SyntacticMatches, 6 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=7, InterpolantAutomatonStates: 77, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 60 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 363 NumberOfCodeBlocks, 357 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 409 ConstructedInterpolants, 0 QuantifiedInterpolants, 1127 SizeOfPredicates, 5 NumberOfNonLiveVariables, 596 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 47/76 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-02 01:12:26,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...