java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-simple/sll2n_append_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 11:01:40,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 11:01:40,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 11:01:40,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 11:01:40,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 11:01:40,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 11:01:40,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 11:01:40,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 11:01:40,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 11:01:40,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 11:01:40,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 11:01:40,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 11:01:40,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 11:01:40,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 11:01:40,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 11:01:40,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 11:01:40,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 11:01:40,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 11:01:40,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 11:01:40,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 11:01:40,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 11:01:40,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 11:01:40,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 11:01:40,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 11:01:40,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-02 11:01:40,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-02 11:01:40,880 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-02 11:01:40,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-02 11:01:40,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-02 11:01:40,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-02 11:01:40,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 11:01:40,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 11:01:40,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 11:01:40,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 11:01:40,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 11:01:40,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 11:01:40,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 11:01:40,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 11:01:40,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 11:01:40,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 11:01:40,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 11:01:40,893 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 [2019-10-02 11:01:40,911 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 11:01:40,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 11:01:40,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 11:01:40,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 11:01:40,913 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 11:01:40,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 11:01:40,913 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 11:01:40,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 11:01:40,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 11:01:40,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 11:01:40,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 11:01:40,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 11:01:40,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 11:01:40,914 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 11:01:40,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 11:01:40,915 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 11:01:40,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 11:01:40,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 11:01:40,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 11:01:40,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 11:01:40,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 11:01:40,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 11:01:40,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 11:01:40,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 11:01:40,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 11:01:40,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 11:01:40,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 11:01:40,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 11:01:40,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 11:01:40,944 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 11:01:40,958 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 11:01:40,961 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 11:01:40,963 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 11:01:40,963 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 11:01:40,964 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_append_unequal.i [2019-10-02 11:01:41,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fdc694fc/c49e6b166be849cabf9c7be22dd1c61e/FLAG428ab34a5 [2019-10-02 11:01:41,610 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 11:01:41,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_append_unequal.i [2019-10-02 11:01:41,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fdc694fc/c49e6b166be849cabf9c7be22dd1c61e/FLAG428ab34a5 [2019-10-02 11:01:41,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fdc694fc/c49e6b166be849cabf9c7be22dd1c61e [2019-10-02 11:01:41,855 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 11:01:41,856 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 11:01:41,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 11:01:41,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 11:01:41,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 11:01:41,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:01:41" (1/1) ... [2019-10-02 11:01:41,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b01dc7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:01:41, skipping insertion in model container [2019-10-02 11:01:41,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:01:41" (1/1) ... [2019-10-02 11:01:41,872 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 11:01:41,922 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 11:01:42,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:01:42,390 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 11:01:42,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:01:42,561 INFO L192 MainTranslator]: Completed translation [2019-10-02 11:01:42,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:01:42 WrapperNode [2019-10-02 11:01:42,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 11:01:42,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 11:01:42,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 11:01:42,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 11:01:42,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:01:42" (1/1) ... [2019-10-02 11:01:42,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:01:42" (1/1) ... [2019-10-02 11:01:42,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:01:42" (1/1) ... [2019-10-02 11:01:42,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:01:42" (1/1) ... [2019-10-02 11:01:42,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:01:42" (1/1) ... [2019-10-02 11:01:42,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:01:42" (1/1) ... [2019-10-02 11:01:42,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:01:42" (1/1) ... [2019-10-02 11:01:42,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 11:01:42,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 11:01:42,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 11:01:42,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 11:01:42,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:01:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 11:01:42,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 11:01:42,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 11:01:42,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-02 11:01:42,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-02 11:01:42,689 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-02 11:01:42,689 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-02 11:01:42,689 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-10-02 11:01:42,689 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-10-02 11:01:42,689 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2019-10-02 11:01:42,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 11:01:42,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 11:01:42,690 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-02 11:01:42,690 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-02 11:01:42,690 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-02 11:01:42,690 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-02 11:01:42,691 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-02 11:01:42,691 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-02 11:01:42,691 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-02 11:01:42,691 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-02 11:01:42,691 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-02 11:01:42,691 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-02 11:01:42,692 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-02 11:01:42,692 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-02 11:01:42,692 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-02 11:01:42,692 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-02 11:01:42,692 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-02 11:01:42,692 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-02 11:01:42,693 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-02 11:01:42,693 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-02 11:01:42,693 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-02 11:01:42,693 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-02 11:01:42,693 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-02 11:01:42,693 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-02 11:01:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-02 11:01:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-02 11:01:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-02 11:01:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-02 11:01:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-02 11:01:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-02 11:01:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-02 11:01:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-02 11:01:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-02 11:01:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-02 11:01:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-02 11:01:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-02 11:01:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-02 11:01:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-02 11:01:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-02 11:01:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-02 11:01:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-02 11:01:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-02 11:01:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-02 11:01:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-02 11:01:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-02 11:01:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-02 11:01:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-02 11:01:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-02 11:01:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-02 11:01:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-02 11:01:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-02 11:01:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-02 11:01:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-02 11:01:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-02 11:01:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-02 11:01:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-02 11:01:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-02 11:01:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-02 11:01:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-02 11:01:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-02 11:01:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-02 11:01:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-02 11:01:42,700 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-02 11:01:42,700 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-02 11:01:42,700 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-02 11:01:42,700 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-02 11:01:42,700 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-02 11:01:42,700 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 11:01:42,700 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-02 11:01:42,701 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-02 11:01:42,701 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-02 11:01:42,701 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-02 11:01:42,701 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-02 11:01:42,701 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-02 11:01:42,701 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-02 11:01:42,702 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-02 11:01:42,702 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-02 11:01:42,702 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-02 11:01:42,702 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-02 11:01:42,702 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-02 11:01:42,702 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-02 11:01:42,703 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-02 11:01:42,703 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-02 11:01:42,703 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-02 11:01:42,703 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-02 11:01:42,703 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-02 11:01:42,703 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-02 11:01:42,703 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-02 11:01:42,704 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-02 11:01:42,704 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-02 11:01:42,704 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-02 11:01:42,704 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-02 11:01:42,704 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-02 11:01:42,704 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-02 11:01:42,705 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-02 11:01:42,705 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-02 11:01:42,705 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-02 11:01:42,705 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-02 11:01:42,705 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-02 11:01:42,705 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-02 11:01:42,705 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-02 11:01:42,706 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-02 11:01:42,706 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-02 11:01:42,706 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-02 11:01:42,706 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-02 11:01:42,706 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-02 11:01:42,706 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-02 11:01:42,706 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-02 11:01:42,707 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-02 11:01:42,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-02 11:01:42,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-02 11:01:42,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-02 11:01:42,707 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-10-02 11:01:42,707 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-10-02 11:01:42,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-02 11:01:42,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-02 11:01:42,708 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2019-10-02 11:01:42,708 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 11:01:42,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-02 11:01:42,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-02 11:01:42,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-02 11:01:42,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 11:01:42,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 11:01:43,143 INFO L683 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-02 11:01:43,395 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 11:01:43,396 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-02 11:01:43,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:01:43 BoogieIcfgContainer [2019-10-02 11:01:43,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 11:01:43,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 11:01:43,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 11:01:43,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 11:01:43,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 11:01:41" (1/3) ... [2019-10-02 11:01:43,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a19caf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:01:43, skipping insertion in model container [2019-10-02 11:01:43,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:01:42" (2/3) ... [2019-10-02 11:01:43,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a19caf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:01:43, skipping insertion in model container [2019-10-02 11:01:43,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:01:43" (3/3) ... [2019-10-02 11:01:43,406 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2019-10-02 11:01:43,416 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 11:01:43,425 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 11:01:43,443 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 11:01:43,474 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 11:01:43,475 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 11:01:43,475 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 11:01:43,476 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 11:01:43,476 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 11:01:43,476 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 11:01:43,477 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 11:01:43,477 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 11:01:43,477 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 11:01:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2019-10-02 11:01:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-02 11:01:43,504 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:01:43,505 INFO L411 BasicCegarLoop]: 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] [2019-10-02 11:01:43,507 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:01:43,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:01:43,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1433043619, now seen corresponding path program 1 times [2019-10-02 11:01:43,515 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:01:43,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:01:43,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:01:43,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:01:43,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:01:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:01:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:01:43,701 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:01:43,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 11:01:43,705 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 11:01:43,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 11:01:43,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 11:01:43,718 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2019-10-02 11:01:43,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:01:43,747 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2019-10-02 11:01:43,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 11:01:43,749 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2019-10-02 11:01:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:01:43,758 INFO L225 Difference]: With dead ends: 96 [2019-10-02 11:01:43,759 INFO L226 Difference]: Without dead ends: 41 [2019-10-02 11:01:43,762 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 11:01:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-02 11:01:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-02 11:01:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-02 11:01:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-10-02 11:01:43,804 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 29 [2019-10-02 11:01:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:01:43,805 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-10-02 11:01:43,805 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 11:01:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-10-02 11:01:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-02 11:01:43,807 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:01:43,808 INFO L411 BasicCegarLoop]: 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] [2019-10-02 11:01:43,808 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:01:43,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:01:43,809 INFO L82 PathProgramCache]: Analyzing trace with hash -257763685, now seen corresponding path program 1 times [2019-10-02 11:01:43,809 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:01:43,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:01:43,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:01:43,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:01:43,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:01:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:01:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:01:43,972 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:01:43,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 11:01:43,973 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 11:01:43,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 11:01:43,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 11:01:43,974 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 5 states. [2019-10-02 11:01:44,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:01:44,035 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2019-10-02 11:01:44,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 11:01:44,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-10-02 11:01:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:01:44,039 INFO L225 Difference]: With dead ends: 74 [2019-10-02 11:01:44,039 INFO L226 Difference]: Without dead ends: 45 [2019-10-02 11:01:44,040 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:01:44,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-02 11:01:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-10-02 11:01:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-02 11:01:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2019-10-02 11:01:44,050 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 29 [2019-10-02 11:01:44,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:01:44,051 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2019-10-02 11:01:44,051 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 11:01:44,051 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2019-10-02 11:01:44,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-02 11:01:44,052 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:01:44,053 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:01:44,053 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:01:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:01:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash 58818396, now seen corresponding path program 1 times [2019-10-02 11:01:44,053 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:01:44,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:01:44,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:01:44,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:01:44,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:01:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:01:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-02 11:01:44,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 11:01:44,224 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 11:01:44,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:01:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:01:44,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 11:01:44,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:01:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:01:44,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 11:01:44,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-10-02 11:01:44,414 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 11:01:44,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 11:01:44,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:01:44,415 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 6 states. [2019-10-02 11:01:44,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:01:44,478 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2019-10-02 11:01:44,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 11:01:44,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-10-02 11:01:44,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:01:44,480 INFO L225 Difference]: With dead ends: 78 [2019-10-02 11:01:44,480 INFO L226 Difference]: Without dead ends: 49 [2019-10-02 11:01:44,481 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:01:44,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-02 11:01:44,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-10-02 11:01:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-02 11:01:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2019-10-02 11:01:44,489 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 38 [2019-10-02 11:01:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:01:44,489 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2019-10-02 11:01:44,489 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 11:01:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2019-10-02 11:01:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-02 11:01:44,491 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:01:44,491 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:01:44,492 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:01:44,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:01:44,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1476517957, now seen corresponding path program 2 times [2019-10-02 11:01:44,492 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:01:44,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:01:44,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:01:44,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:01:44,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:01:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:01:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 11:01:44,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 11:01:44,953 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 11:01:45,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:01:45,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:01:45,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:01:45,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 41 conjunts are in the unsatisfiable core [2019-10-02 11:01:45,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:01:45,362 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2019-10-02 11:01:45,363 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-02 11:01:45,371 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-02 11:01:45,372 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-02 11:01:45,373 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-02 11:01:47,486 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (and (<= (+ |c_#StackHeapBarrier| 1) node_create_~temp~0.base) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) (+ node_create_~temp~0.offset 4) 0) node_create_~temp~0.offset (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) node_create_~temp~0.offset)))))) is different from true