/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/forester-heap/sll-optional-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:13:40,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:13:40,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:13:40,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:13:40,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:13:40,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:13:40,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:13:40,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:13:40,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:13:40,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:13:40,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:13:40,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:13:40,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:13:40,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:13:40,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:13:40,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:13:40,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:13:40,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:13:40,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:13:40,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:13:40,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:13:40,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:13:40,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:13:40,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:13:40,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 16:13:40,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 16:13:40,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 16:13:40,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 16:13:40,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 16:13:40,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 16:13:40,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 16:13:40,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 16:13:40,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 16:13:40,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 16:13:40,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 16:13:40,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 16:13:40,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 16:13:40,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 16:13:40,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:13:40,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:13:40,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:13:40,972 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 [2021-02-21 16:13:41,025 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:13:41,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:13:41,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:13:41,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:13:41,028 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:13:41,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:13:41,028 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:13:41,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:13:41,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:13:41,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:13:41,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:13:41,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:13:41,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:13:41,031 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:13:41,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:13:41,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:13:41,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:13:41,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:13:41,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:13:41,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:13:41,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:13:41,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:13:41,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:13:41,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:13:41,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:13:41,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:13:41,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:13:41,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:13:41,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:13:41,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:13:41,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:13:41,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:13:41,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:13:41,490 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:13:41,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-optional-2.i [2021-02-21 16:13:41,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/848cfc6ea/ca209cdd0cf74e16a17ca600aebae641/FLAGce1e897ca [2021-02-21 16:13:42,331 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:13:42,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-optional-2.i [2021-02-21 16:13:42,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/848cfc6ea/ca209cdd0cf74e16a17ca600aebae641/FLAGce1e897ca [2021-02-21 16:13:42,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/848cfc6ea/ca209cdd0cf74e16a17ca600aebae641 [2021-02-21 16:13:42,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:13:42,380 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:13:42,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:13:42,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:13:42,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:13:42,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:13:42" (1/1) ... [2021-02-21 16:13:42,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14588a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:42, skipping insertion in model container [2021-02-21 16:13:42,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:13:42" (1/1) ... [2021-02-21 16:13:42,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:13:42,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:13:42,749 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-optional-2.i[22641,22654] [2021-02-21 16:13:42,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:13:42,765 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:13:42,808 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-optional-2.i[22641,22654] [2021-02-21 16:13:42,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:13:42,876 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:13:42,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:42 WrapperNode [2021-02-21 16:13:42,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:13:42,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:13:42,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:13:42,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:13:42,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:42" (1/1) ... [2021-02-21 16:13:42,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:42" (1/1) ... [2021-02-21 16:13:42,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:42" (1/1) ... [2021-02-21 16:13:42,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:42" (1/1) ... [2021-02-21 16:13:42,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:42" (1/1) ... [2021-02-21 16:13:42,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:42" (1/1) ... [2021-02-21 16:13:43,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:42" (1/1) ... [2021-02-21 16:13:43,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:13:43,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:13:43,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:13:43,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:13:43,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:42" (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 [2021-02-21 16:13:43,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:13:43,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:13:43,135 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:13:43,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:13:43,136 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-21 16:13:43,136 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-21 16:13:43,136 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-21 16:13:43,136 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-21 16:13:43,137 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-21 16:13:43,138 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-21 16:13:43,138 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-21 16:13:43,138 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-21 16:13:43,139 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-21 16:13:43,139 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-21 16:13:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-21 16:13:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-21 16:13:43,141 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-21 16:13:43,141 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-21 16:13:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-21 16:13:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-21 16:13:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-21 16:13:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-21 16:13:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-21 16:13:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-21 16:13:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-21 16:13:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-21 16:13:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-21 16:13:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-21 16:13:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-21 16:13:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-21 16:13:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-21 16:13:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-21 16:13:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-21 16:13:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-21 16:13:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-21 16:13:43,149 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-21 16:13:43,149 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-21 16:13:43,149 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-21 16:13:43,149 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-21 16:13:43,149 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-21 16:13:43,149 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-21 16:13:43,149 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-21 16:13:43,149 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-21 16:13:43,150 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-21 16:13:43,150 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-21 16:13:43,150 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-21 16:13:43,150 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-21 16:13:43,150 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-21 16:13:43,150 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-21 16:13:43,150 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-21 16:13:43,150 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-21 16:13:43,150 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-21 16:13:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-21 16:13:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-21 16:13:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 16:13:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-21 16:13:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-21 16:13:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-21 16:13:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-21 16:13:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-21 16:13:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-21 16:13:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-21 16:13:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-21 16:13:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:13:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-21 16:13:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-21 16:13:43,153 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-21 16:13:43,153 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-21 16:13:43,153 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-21 16:13:43,153 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-21 16:13:43,153 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-21 16:13:43,153 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-21 16:13:43,153 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-21 16:13:43,153 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-21 16:13:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-21 16:13:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-21 16:13:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-21 16:13:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-21 16:13:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-21 16:13:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-21 16:13:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-21 16:13:43,155 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-21 16:13:43,155 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-21 16:13:43,155 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-21 16:13:43,155 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-21 16:13:43,155 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-21 16:13:43,155 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-21 16:13:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-21 16:13:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-21 16:13:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-21 16:13:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-21 16:13:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-21 16:13:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-21 16:13:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-21 16:13:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-21 16:13:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-21 16:13:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-21 16:13:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-21 16:13:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-21 16:13:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-21 16:13:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-21 16:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-21 16:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-21 16:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-21 16:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-21 16:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-21 16:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-21 16:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:13:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 16:13:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 16:13:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:13:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:13:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:13:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 16:13:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 16:13:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:13:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 16:13:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:13:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:13:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:13:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:13:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:13:43,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:13:43,787 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-02-21 16:13:43,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:13:43 BoogieIcfgContainer [2021-02-21 16:13:43,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:13:43,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:13:43,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:13:43,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:13:43,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:13:42" (1/3) ... [2021-02-21 16:13:43,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9bd5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:13:43, skipping insertion in model container [2021-02-21 16:13:43,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:42" (2/3) ... [2021-02-21 16:13:43,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9bd5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:13:43, skipping insertion in model container [2021-02-21 16:13:43,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:13:43" (3/3) ... [2021-02-21 16:13:43,804 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-optional-2.i [2021-02-21 16:13:43,813 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:13:43,820 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:13:43,844 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:13:43,890 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:13:43,890 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:13:43,891 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:13:43,895 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:13:43,896 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:13:43,896 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:13:43,896 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:13:43,896 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:13:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2021-02-21 16:13:43,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-21 16:13:43,926 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:13:43,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:13:43,927 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:13:43,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:13:43,935 INFO L82 PathProgramCache]: Analyzing trace with hash 294516056, now seen corresponding path program 1 times [2021-02-21 16:13:43,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:13:43,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226202538] [2021-02-21 16:13:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:13:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:13:44,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:44,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:44,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:44,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:44,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:13:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:13:44,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:44,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:13:44,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226202538] [2021-02-21 16:13:44,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:13:44,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 16:13:44,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681132908] [2021-02-21 16:13:44,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 16:13:44,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:13:44,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 16:13:44,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 16:13:44,363 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2021-02-21 16:13:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:13:44,544 INFO L93 Difference]: Finished difference Result 49 states and 71 transitions. [2021-02-21 16:13:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 16:13:44,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2021-02-21 16:13:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:13:44,566 INFO L225 Difference]: With dead ends: 49 [2021-02-21 16:13:44,566 INFO L226 Difference]: Without dead ends: 22 [2021-02-21 16:13:44,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 16:13:44,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-02-21 16:13:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-02-21 16:13:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-02-21 16:13:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-02-21 16:13:44,619 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 15 [2021-02-21 16:13:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:13:44,619 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-02-21 16:13:44,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 16:13:44,620 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-02-21 16:13:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-21 16:13:44,620 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:13:44,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:13:44,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:13:44,622 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:13:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:13:44,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1065045589, now seen corresponding path program 1 times [2021-02-21 16:13:44,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:13:44,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359124140] [2021-02-21 16:13:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:13:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:13:44,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:44,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:44,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:44,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:13:44,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:44,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 16:13:44,826 WARN L141 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size [2021-02-21 16:13:44,827 WARN L147 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size 13 [2021-02-21 16:13:44,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:44,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:44,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:44,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:44,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:13:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:13:44,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:44,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:13:44,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359124140] [2021-02-21 16:13:44,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:13:44,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 16:13:44,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052875834] [2021-02-21 16:13:44,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 16:13:44,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:13:44,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 16:13:44,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-21 16:13:44,922 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 7 states. [2021-02-21 16:13:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:13:45,184 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2021-02-21 16:13:45,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 16:13:45,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-02-21 16:13:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:13:45,186 INFO L225 Difference]: With dead ends: 52 [2021-02-21 16:13:45,187 INFO L226 Difference]: Without dead ends: 44 [2021-02-21 16:13:45,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-21 16:13:45,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-02-21 16:13:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-02-21 16:13:45,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-21 16:13:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-02-21 16:13:45,197 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2021-02-21 16:13:45,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:13:45,197 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-02-21 16:13:45,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 16:13:45,198 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-02-21 16:13:45,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-21 16:13:45,199 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:13:45,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:13:45,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:13:45,199 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:13:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:13:45,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1065043667, now seen corresponding path program 1 times [2021-02-21 16:13:45,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:13:45,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274747937] [2021-02-21 16:13:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:13:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:13:45,226 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:13:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:13:45,249 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:13:45,291 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:13:45,292 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:13:45,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:13:45,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:13:45 BoogieIcfgContainer [2021-02-21 16:13:45,340 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:13:45,342 INFO L168 Benchmark]: Toolchain (without parser) took 2973.74 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 89.9 MB in the end (delta: 34.9 MB). Peak memory consumption was 36.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:13:45,344 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:13:45,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 495.54 ms. Allocated memory is still 151.0 MB. Free memory was 123.8 MB in the beginning and 101.8 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:13:45,347 INFO L168 Benchmark]: Boogie Preprocessor took 145.58 ms. Allocated memory is still 151.0 MB. Free memory was 101.8 MB in the beginning and 132.9 MB in the end (delta: -31.1 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. [2021-02-21 16:13:45,351 INFO L168 Benchmark]: RCFGBuilder took 762.80 ms. Allocated memory is still 151.0 MB. Free memory was 132.9 MB in the beginning and 88.9 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:13:45,352 INFO L168 Benchmark]: TraceAbstraction took 1546.88 ms. Allocated memory is still 151.0 MB. Free memory was 88.4 MB in the beginning and 89.9 MB in the end (delta: -1.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:13:45,362 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 495.54 ms. Allocated memory is still 151.0 MB. Free memory was 123.8 MB in the beginning and 101.8 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 145.58 ms. Allocated memory is still 151.0 MB. Free memory was 101.8 MB in the beginning and 132.9 MB in the end (delta: -31.1 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 762.80 ms. Allocated memory is still 151.0 MB. Free memory was 132.9 MB in the beginning and 88.9 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1546.88 ms. Allocated memory is still 151.0 MB. Free memory was 88.4 MB in the beginning and 89.9 MB in the end (delta: -1.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1007]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L996] SLL* head = malloc(sizeof(SLL)); [L997] head->next = ((void*)0) [L998] COND TRUE __VERIFIER_nondet_int() [L998] head->data = 2 [L998] head->opt = malloc(sizeof(SLL)) [L998] EXPR head->opt [L998] head->opt->next = ((void*)0) [L999] SLL* x = head; VAL [head={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}] [L1001] COND FALSE !(__VERIFIER_nondet_int()) [L1004] x = head VAL [head={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}] [L1005] COND TRUE x != ((void*)0) VAL [head={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}] [L1007] EXPR x->data [L1007] EXPR x->data == 2 && x->opt == x [L1007] EXPR x->opt [L1007] EXPR x->data == 2 && x->opt == x VAL [head={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}, x->data=2, x->data == 2 && x->opt == x=0, x->opt={-2:0}] [L1007] COND TRUE !(x->data == 2 && x->opt == x) [L1007] reach_error() VAL [head={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 52 SDslu, 54 SDs, 0 SdLazy, 125 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 15 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 2317 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...