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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/list-simple/sll2n_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 01:48:16,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 01:48:16,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 01:48:16,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-10 01:48:16,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-10 01:48:16,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-10 01:48:16,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-10 01:48:16,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-10 01:48:16,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-10 01:48:16,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-10 01:48:16,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-10 01:48:16,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-10 01:48:16,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 01:48:16,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 01:48:16,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 01:48:16,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 01:48:16,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 01:48:16,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 01:48:16,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 01:48:16,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 01:48:16,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 01:48:16,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 01:48:16,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 01:48:16,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 01:48:16,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-10 01:48:16,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-10 01:48:16,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-10 01:48:16,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-10 01:48:16,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-10 01:48:16,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-10 01:48:16,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 01:48:16,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 01:48:16,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 01:48:16,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 01:48:16,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 01:48:16,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 01:48:16,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 01:48:16,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 01:48:16,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 01:48:16,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 01:48:16,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 01:48:16,160 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-10 01:48:16,175 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 01:48:16,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 01:48:16,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 01:48:16,176 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 01:48:16,177 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 01:48:16,177 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 01:48:16,177 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 01:48:16,177 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 01:48:16,178 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 01:48:16,178 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 01:48:16,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 01:48:16,179 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 01:48:16,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 01:48:16,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 01:48:16,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 01:48:16,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 01:48:16,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 01:48:16,180 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 01:48:16,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 01:48:16,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 01:48:16,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 01:48:16,181 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 01:48:16,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 01:48:16,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:48:16,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 01:48:16,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 01:48:16,182 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 01:48:16,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 01:48:16,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 01:48:16,182 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 01:48:16,214 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 01:48:16,227 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 01:48:16,230 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 01:48:16,232 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 01:48:16,233 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 01:48:16,233 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_remove_all_reverse.i [2019-09-10 01:48:16,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/558ee68b9/279e71b5c76b4a3ea82a98a179cf3d98/FLAG15726aa30 [2019-09-10 01:48:16,777 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 01:48:16,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_remove_all_reverse.i [2019-09-10 01:48:16,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/558ee68b9/279e71b5c76b4a3ea82a98a179cf3d98/FLAG15726aa30 [2019-09-10 01:48:17,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/558ee68b9/279e71b5c76b4a3ea82a98a179cf3d98 [2019-09-10 01:48:17,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 01:48:17,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 01:48:17,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 01:48:17,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 01:48:17,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 01:48:17,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:48:17" (1/1) ... [2019-09-10 01:48:17,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73b75b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:17, skipping insertion in model container [2019-09-10 01:48:17,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:48:17" (1/1) ... [2019-09-10 01:48:17,109 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 01:48:17,174 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 01:48:17,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:48:17,646 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 01:48:17,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:48:17,762 INFO L192 MainTranslator]: Completed translation [2019-09-10 01:48:17,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:17 WrapperNode [2019-09-10 01:48:17,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 01:48:17,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 01:48:17,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 01:48:17,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 01:48:17,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:17" (1/1) ... [2019-09-10 01:48:17,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:17" (1/1) ... [2019-09-10 01:48:17,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:17" (1/1) ... [2019-09-10 01:48:17,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:17" (1/1) ... [2019-09-10 01:48:17,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:17" (1/1) ... [2019-09-10 01:48:17,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:17" (1/1) ... [2019-09-10 01:48:17,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:17" (1/1) ... [2019-09-10 01:48:17,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 01:48:17,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 01:48:17,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 01:48:17,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 01:48:17,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:17" (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 [2019-09-10 01:48:17,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 01:48:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 01:48:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-09-10 01:48:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-09-10 01:48:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-09-10 01:48:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-09-10 01:48:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-09-10 01:48:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_remove_last [2019-09-10 01:48:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 01:48:17,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 01:48:17,892 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-09-10 01:48:17,892 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-09-10 01:48:17,892 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-09-10 01:48:17,892 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-09-10 01:48:17,896 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-09-10 01:48:17,896 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-09-10 01:48:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-09-10 01:48:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-09-10 01:48:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-09-10 01:48:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-09-10 01:48:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-09-10 01:48:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-09-10 01:48:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-09-10 01:48:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-09-10 01:48:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-09-10 01:48:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-09-10 01:48:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-09-10 01:48:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-09-10 01:48:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-09-10 01:48:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-09-10 01:48:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-09-10 01:48:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-09-10 01:48:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-09-10 01:48:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-09-10 01:48:17,901 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-09-10 01:48:17,901 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-09-10 01:48:17,901 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-09-10 01:48:17,901 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-09-10 01:48:17,901 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-09-10 01:48:17,901 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-09-10 01:48:17,901 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-09-10 01:48:17,902 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-09-10 01:48:17,902 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-09-10 01:48:17,902 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-09-10 01:48:17,902 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-09-10 01:48:17,903 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-09-10 01:48:17,903 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-09-10 01:48:17,903 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-09-10 01:48:17,903 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-09-10 01:48:17,903 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-09-10 01:48:17,904 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-09-10 01:48:17,904 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-09-10 01:48:17,904 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-09-10 01:48:17,904 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-09-10 01:48:17,904 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-09-10 01:48:17,904 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-09-10 01:48:17,904 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-09-10 01:48:17,905 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-09-10 01:48:17,905 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-09-10 01:48:17,905 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-09-10 01:48:17,905 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-09-10 01:48:17,906 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-09-10 01:48:17,906 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-10 01:48:17,906 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-09-10 01:48:17,906 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-09-10 01:48:17,906 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-10 01:48:17,907 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-09-10 01:48:17,907 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-09-10 01:48:17,908 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-09-10 01:48:17,908 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-09-10 01:48:17,908 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-09-10 01:48:17,908 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-09-10 01:48:17,908 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-09-10 01:48:17,909 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-09-10 01:48:17,909 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-09-10 01:48:17,910 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-10 01:48:17,910 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-09-10 01:48:17,911 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-09-10 01:48:17,911 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-09-10 01:48:17,912 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-09-10 01:48:17,912 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-09-10 01:48:17,912 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-09-10 01:48:17,912 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-09-10 01:48:17,912 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-09-10 01:48:17,912 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-09-10 01:48:17,913 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-09-10 01:48:17,913 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-09-10 01:48:17,914 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-09-10 01:48:17,914 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-09-10 01:48:17,915 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-09-10 01:48:17,915 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-09-10 01:48:17,915 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-09-10 01:48:17,915 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-09-10 01:48:17,915 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-09-10 01:48:17,915 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-09-10 01:48:17,915 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-09-10 01:48:17,916 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-09-10 01:48:17,916 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-09-10 01:48:17,916 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-09-10 01:48:17,916 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-09-10 01:48:17,916 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-09-10 01:48:17,916 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-09-10 01:48:17,916 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-09-10 01:48:17,916 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-09-10 01:48:17,917 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-09-10 01:48:17,917 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-09-10 01:48:17,917 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-09-10 01:48:17,917 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-09-10 01:48:17,917 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-09-10 01:48:17,917 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-09-10 01:48:17,917 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-09-10 01:48:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-09-10 01:48:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-09-10 01:48:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-09-10 01:48:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-09-10 01:48:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-09-10 01:48:17,919 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-09-10 01:48:17,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-10 01:48:17,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-10 01:48:17,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-10 01:48:17,920 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-09-10 01:48:17,921 INFO L130 BoogieDeclarations]: Found specification of procedure sll_remove_last [2019-09-10 01:48:17,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-10 01:48:17,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-10 01:48:17,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 01:48:17,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-10 01:48:17,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-09-10 01:48:17,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 01:48:17,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 01:48:17,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-10 01:48:18,314 INFO L684 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-09-10 01:48:18,500 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 01:48:18,500 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-10 01:48:18,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:48:18 BoogieIcfgContainer [2019-09-10 01:48:18,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 01:48:18,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 01:48:18,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 01:48:18,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 01:48:18,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 01:48:17" (1/3) ... [2019-09-10 01:48:18,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672727b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:48:18, skipping insertion in model container [2019-09-10 01:48:18,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:17" (2/3) ... [2019-09-10 01:48:18,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672727b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:48:18, skipping insertion in model container [2019-09-10 01:48:18,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:48:18" (3/3) ... [2019-09-10 01:48:18,516 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2019-09-10 01:48:18,527 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 01:48:18,537 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 01:48:18,555 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 01:48:18,588 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 01:48:18,588 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 01:48:18,588 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 01:48:18,589 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 01:48:18,589 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 01:48:18,589 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 01:48:18,590 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 01:48:18,590 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 01:48:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-09-10 01:48:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-10 01:48:18,619 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:48:18,620 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:48:18,624 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:48:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:18,631 INFO L82 PathProgramCache]: Analyzing trace with hash 852060024, now seen corresponding path program 1 times [2019-09-10 01:48:18,633 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:48:18,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:18,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:48:18,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:18,695 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:48:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:48:18,789 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:48:18,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-10 01:48:18,790 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:18,795 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 01:48:18,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 01:48:18,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:48:18,814 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2019-09-10 01:48:18,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:18,834 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-09-10 01:48:18,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 01:48:18,836 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-09-10 01:48:18,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:18,845 INFO L225 Difference]: With dead ends: 42 [2019-09-10 01:48:18,845 INFO L226 Difference]: Without dead ends: 35 [2019-09-10 01:48:18,847 INFO L628 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 [2019-09-10 01:48:18,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-10 01:48:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-10 01:48:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-10 01:48:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-09-10 01:48:18,884 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 17 [2019-09-10 01:48:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:18,884 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-09-10 01:48:18,885 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 01:48:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-09-10 01:48:18,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-10 01:48:18,886 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:48:18,886 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:48:18,886 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:48:18,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:18,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1868381993, now seen corresponding path program 1 times [2019-09-10 01:48:18,887 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:48:18,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:18,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:48:18,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:18,889 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:48:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:48:18,970 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:48:18,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-10 01:48:18,970 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:18,972 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-10 01:48:18,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-10 01:48:18,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-10 01:48:18,973 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 4 states. [2019-09-10 01:48:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:19,013 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-09-10 01:48:19,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 01:48:19,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-09-10 01:48:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:19,016 INFO L225 Difference]: With dead ends: 38 [2019-09-10 01:48:19,016 INFO L226 Difference]: Without dead ends: 38 [2019-09-10 01:48:19,017 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-10 01:48:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-10 01:48:19,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2019-09-10 01:48:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-10 01:48:19,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-09-10 01:48:19,028 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 17 [2019-09-10 01:48:19,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:19,029 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-09-10 01:48:19,029 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-10 01:48:19,029 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-09-10 01:48:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-10 01:48:19,030 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:48:19,031 INFO L399 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] [2019-09-10 01:48:19,031 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:48:19,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:19,031 INFO L82 PathProgramCache]: Analyzing trace with hash 528543346, now seen corresponding path program 1 times [2019-09-10 01:48:19,032 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:48:19,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:19,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:48:19,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:19,034 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:48:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:48:19,208 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:48:19,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-10 01:48:19,208 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:19,209 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 01:48:19,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 01:48:19,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-10 01:48:19,209 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2019-09-10 01:48:19,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:19,386 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2019-09-10 01:48:19,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 01:48:19,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-09-10 01:48:19,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:19,388 INFO L225 Difference]: With dead ends: 48 [2019-09-10 01:48:19,389 INFO L226 Difference]: Without dead ends: 36 [2019-09-10 01:48:19,391 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-10 01:48:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-10 01:48:19,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-10 01:48:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-10 01:48:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-09-10 01:48:19,399 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2019-09-10 01:48:19,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:19,400 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-09-10 01:48:19,400 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 01:48:19,401 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-09-10 01:48:19,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-10 01:48:19,408 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:48:19,408 INFO L399 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] [2019-09-10 01:48:19,409 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:48:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:19,412 INFO L82 PathProgramCache]: Analyzing trace with hash -233245789, now seen corresponding path program 1 times [2019-09-10 01:48:19,413 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:48:19,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:19,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:48:19,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:19,415 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:48:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:48:19,501 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:48:19,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 01:48:19,502 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:19,503 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 01:48:19,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 01:48:19,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 01:48:19,504 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2019-09-10 01:48:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:19,547 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2019-09-10 01:48:19,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 01:48:19,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-09-10 01:48:19,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:19,548 INFO L225 Difference]: With dead ends: 43 [2019-09-10 01:48:19,549 INFO L226 Difference]: Without dead ends: 40 [2019-09-10 01:48:19,549 INFO L628 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 [2019-09-10 01:48:19,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-10 01:48:19,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-09-10 01:48:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-10 01:48:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-09-10 01:48:19,555 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2019-09-10 01:48:19,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:19,555 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-09-10 01:48:19,555 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 01:48:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-09-10 01:48:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-10 01:48:19,557 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:48:19,557 INFO L399 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, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:48:19,557 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:48:19,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:19,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2086641938, now seen corresponding path program 1 times [2019-09-10 01:48:19,558 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:48:19,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:19,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:48:19,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:19,559 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:48:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:48:19,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:48:19,679 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:48:19,680 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2019-09-10 01:48:19,682 INFO L207 CegarAbsIntRunner]: [7], [13], [15], [17], [19], [23], [24], [25], [31], [33], [34], [35], [36], [37], [39], [45], [47], [50], [54], [57], [60], [63], [68], [73], [76], [82], [84], [90], [91], [94], [95], [96], [97], [98], [99], [100] [2019-09-10 01:48:19,721 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:48:19,721 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:48:19,778 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-10 01:48:19,780 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 0. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 26 variables. [2019-09-10 01:48:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:19,785 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-10 01:48:19,829 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-10 01:48:19,829 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-10 01:48:19,832 INFO L420 sIntCurrentIteration]: We unified 35 AI predicates to 35 [2019-09-10 01:48:19,832 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-10 01:48:19,832 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-10 01:48:19,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 6 [2019-09-10 01:48:19,833 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:19,833 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 01:48:19,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 01:48:19,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:48:19,834 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 2 states. [2019-09-10 01:48:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:19,835 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-10 01:48:19,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 01:48:19,835 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2019-09-10 01:48:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:19,835 INFO L225 Difference]: With dead ends: 6 [2019-09-10 01:48:19,835 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 01:48:19,836 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:48:19,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 01:48:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 01:48:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 01:48:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 01:48:19,836 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2019-09-10 01:48:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:19,836 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 01:48:19,836 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 01:48:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 01:48:19,837 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 01:48:19,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 01:48:19 BoogieIcfgContainer [2019-09-10 01:48:19,841 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 01:48:19,844 INFO L168 Benchmark]: Toolchain (without parser) took 2751.97 ms. Allocated memory was 135.8 MB in the beginning and 231.2 MB in the end (delta: 95.4 MB). Free memory was 90.1 MB in the beginning and 142.8 MB in the end (delta: -52.7 MB). Peak memory consumption was 42.7 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:19,844 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 135.8 MB. Free memory is still 110.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-10 01:48:19,848 INFO L168 Benchmark]: CACSL2BoogieTranslator took 670.29 ms. Allocated memory was 135.8 MB in the beginning and 201.3 MB in the end (delta: 65.5 MB). Free memory was 90.1 MB in the beginning and 162.2 MB in the end (delta: -72.1 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:19,851 INFO L168 Benchmark]: Boogie Preprocessor took 72.89 ms. Allocated memory is still 201.3 MB. Free memory was 162.2 MB in the beginning and 159.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:19,851 INFO L168 Benchmark]: RCFGBuilder took 667.40 ms. Allocated memory is still 201.3 MB. Free memory was 159.6 MB in the beginning and 115.1 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:19,854 INFO L168 Benchmark]: TraceAbstraction took 1334.13 ms. Allocated memory was 201.3 MB in the beginning and 231.2 MB in the end (delta: 29.9 MB). Free memory was 114.3 MB in the beginning and 142.8 MB in the end (delta: -28.5 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:19,860 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 135.8 MB. Free memory is still 110.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 670.29 ms. Allocated memory was 135.8 MB in the beginning and 201.3 MB in the end (delta: 65.5 MB). Free memory was 90.1 MB in the beginning and 162.2 MB in the end (delta: -72.1 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 72.89 ms. Allocated memory is still 201.3 MB. Free memory was 162.2 MB in the beginning and 159.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 667.40 ms. Allocated memory is still 201.3 MB. Free memory was 159.6 MB in the beginning and 115.1 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1334.13 ms. Allocated memory was 201.3 MB in the beginning and 231.2 MB in the end (delta: 29.9 MB). Free memory was 114.3 MB in the beginning and 142.8 MB in the end (delta: -28.5 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 608]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 49 locations, 1 error locations. SAFE Result, 1.2s OverallTime, 5 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 158 SDtfs, 36 SDslu, 268 SDs, 0 SdLazy, 83 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9714285714285714 AbsIntWeakeningRatio, 1.457142857142857 AbsIntAvgWeakeningVarsNumRemoved, 0.17142857142857143 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 121 NumberOfCodeBlocks, 121 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 5884 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 3/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...