/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/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:01:13,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:01:13,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:01:13,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-22 02:01:13,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-22 02:01:13,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-22 02:01:13,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-22 02:01:13,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-22 02:01:13,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-22 02:01:13,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-22 02:01:13,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-22 02:01:13,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-22 02:01:13,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:01:13,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:01:13,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:01:13,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:01:13,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:01:13,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:01:13,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:01:13,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:01:13,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:01:13,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:01:13,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:01:13,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:01:13,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-22 02:01:13,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-22 02:01:13,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-22 02:01:13,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-22 02:01:13,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-22 02:01:13,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-22 02:01:13,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-22 02:01:13,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-22 02:01:13,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-22 02:01:13,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-22 02:01:13,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-22 02:01:13,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-22 02:01:13,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-22 02:01:13,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-22 02:01:13,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:01:13,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:01:13,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:01:13,316 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:01:13,329 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:01:13,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:01:13,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:01:13,331 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:01:13,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:01:13,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:01:13,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:01:13,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:01:13,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:01:13,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:01:13,333 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:01:13,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:01:13,334 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:01:13,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:01:13,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:01:13,334 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:01:13,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:01:13,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:01:13,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:01:13,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:01:13,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:01:13,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:01:13,336 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:01:13,336 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:01:13,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:01:13,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:01:13,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:01:13,794 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:01:13,795 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:01:13,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2021-02-22 02:01:13,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436cd87dc/1ff1b3879181437fbc86ce0f2cc65177/FLAG8096e1168 [2021-02-22 02:01:14,620 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:01:14,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2021-02-22 02:01:14,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436cd87dc/1ff1b3879181437fbc86ce0f2cc65177/FLAG8096e1168 [2021-02-22 02:01:14,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436cd87dc/1ff1b3879181437fbc86ce0f2cc65177 [2021-02-22 02:01:14,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:01:14,893 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:01:14,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:01:14,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:01:14,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:01:14,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:01:14" (1/1) ... [2021-02-22 02:01:14,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e88ea8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:01:14, skipping insertion in model container [2021-02-22 02:01:14,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:01:14" (1/1) ... [2021-02-22 02:01:14,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:01:14,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:01:15,338 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i[24032,24045] [2021-02-22 02:01:15,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:01:15,355 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:01:15,446 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i[24032,24045] [2021-02-22 02:01:15,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:01:15,530 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:01:15,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:01:15 WrapperNode [2021-02-22 02:01:15,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:01:15,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:01:15,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:01:15,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:01:15,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:01:15" (1/1) ... [2021-02-22 02:01:15,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:01:15" (1/1) ... [2021-02-22 02:01:15,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:01:15" (1/1) ... [2021-02-22 02:01:15,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:01:15" (1/1) ... [2021-02-22 02:01:15,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:01:15" (1/1) ... [2021-02-22 02:01:15,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:01:15" (1/1) ... [2021-02-22 02:01:15,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:01:15" (1/1) ... [2021-02-22 02:01:15,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:01:15,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:01:15,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:01:15,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:01:15,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:01:15" (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 [2021-02-22 02:01:15,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:01:15,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:01:15,763 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:01:15,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-22 02:01:15,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-22 02:01:15,763 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2021-02-22 02:01:15,763 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2021-02-22 02:01:15,764 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2021-02-22 02:01:15,764 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2021-02-22 02:01:15,764 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-22 02:01:15,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:01:15,764 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:01:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:01:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-22 02:01:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-22 02:01:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:01:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:01:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:01:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-22 02:01:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-22 02:01:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-22 02:01:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-22 02:01:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-22 02:01:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-22 02:01:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-22 02:01:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-22 02:01:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-22 02:01:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-22 02:01:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-22 02:01:15,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-22 02:01:15,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-22 02:01:15,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-22 02:01:15,768 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-22 02:01:15,768 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-22 02:01:15,768 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-22 02:01:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-22 02:01:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-22 02:01:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-22 02:01:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-22 02:01:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-22 02:01:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-22 02:01:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-22 02:01:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-22 02:01:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-22 02:01:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-22 02:01:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-22 02:01:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-22 02:01:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-22 02:01:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-22 02:01:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-22 02:01:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-22 02:01:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-22 02:01:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-22 02:01:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-22 02:01:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-22 02:01:15,772 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-22 02:01:15,772 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-22 02:01:15,772 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-22 02:01:15,772 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-22 02:01:15,772 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-22 02:01:15,772 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-22 02:01:15,772 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-22 02:01:15,773 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-22 02:01:15,773 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-22 02:01:15,773 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-22 02:01:15,773 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-22 02:01:15,773 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-22 02:01:15,773 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-22 02:01:15,773 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-22 02:01:15,774 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-22 02:01:15,774 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 02:01:15,774 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-22 02:01:15,774 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-22 02:01:15,774 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-22 02:01:15,775 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-22 02:01:15,775 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-22 02:01:15,775 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-22 02:01:15,775 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-22 02:01:15,775 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-22 02:01:15,775 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-22 02:01:15,776 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-22 02:01:15,776 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-22 02:01:15,776 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-22 02:01:15,776 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-22 02:01:15,776 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-22 02:01:15,776 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-22 02:01:15,776 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-22 02:01:15,777 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-22 02:01:15,777 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-22 02:01:15,777 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-22 02:01:15,777 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-22 02:01:15,777 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-22 02:01:15,777 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-22 02:01:15,778 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-22 02:01:15,778 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-22 02:01:15,778 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-22 02:01:15,778 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-22 02:01:15,778 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-22 02:01:15,778 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-22 02:01:15,778 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-22 02:01:15,779 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-22 02:01:15,779 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-22 02:01:15,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-22 02:01:15,779 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-22 02:01:15,779 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-22 02:01:15,779 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-22 02:01:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-22 02:01:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-22 02:01:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-22 02:01:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-22 02:01:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-22 02:01:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-22 02:01:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-22 02:01:15,781 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-22 02:01:15,781 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-22 02:01:15,781 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-22 02:01:15,781 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-22 02:01:15,781 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-22 02:01:15,781 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-22 02:01:15,781 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-22 02:01:15,782 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-22 02:01:15,782 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-22 02:01:15,782 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2021-02-22 02:01:15,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 02:01:15,782 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2021-02-22 02:01:15,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-22 02:01:15,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-22 02:01:15,783 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2021-02-22 02:01:15,783 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2021-02-22 02:01:15,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:01:15,783 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-22 02:01:15,783 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:01:15,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:01:15,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:01:15,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:01:15,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:01:15,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:01:16,180 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-22 02:01:16,681 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:01:16,681 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-22 02:01:16,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:01:16 BoogieIcfgContainer [2021-02-22 02:01:16,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:01:16,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:01:16,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:01:16,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:01:16,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:01:14" (1/3) ... [2021-02-22 02:01:16,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15238d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:01:16, skipping insertion in model container [2021-02-22 02:01:16,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:01:15" (2/3) ... [2021-02-22 02:01:16,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15238d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:01:16, skipping insertion in model container [2021-02-22 02:01:16,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:01:16" (3/3) ... [2021-02-22 02:01:16,708 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2021-02-22 02:01:16,720 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:01:16,727 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:01:16,750 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:01:16,789 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:01:16,790 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:01:16,790 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:01:16,791 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:01:16,792 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:01:16,792 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:01:16,792 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:01:16,792 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:01:16,823 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states. [2021-02-22 02:01:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-22 02:01:16,838 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:01:16,839 INFO L422 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] [2021-02-22 02:01:16,843 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:01:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:01:16,853 INFO L82 PathProgramCache]: Analyzing trace with hash 982825577, now seen corresponding path program 1 times [2021-02-22 02:01:16,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:01:16,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34721195] [2021-02-22 02:01:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:01:16,968 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:01:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:01:17,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:17,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:01:17,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:17,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:01:17,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:01:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:01:17,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:17,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:01:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:01:17,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34721195] [2021-02-22 02:01:17,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:01:17,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:01:17,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828123751] [2021-02-22 02:01:17,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:01:17,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:01:17,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:01:17,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:01:17,293 INFO L87 Difference]: Start difference. First operand 162 states. Second operand 3 states. [2021-02-22 02:01:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:01:17,699 INFO L93 Difference]: Finished difference Result 304 states and 338 transitions. [2021-02-22 02:01:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:01:17,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2021-02-22 02:01:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:01:17,712 INFO L225 Difference]: With dead ends: 304 [2021-02-22 02:01:17,712 INFO L226 Difference]: Without dead ends: 42 [2021-02-22 02:01:17,723 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 [2021-02-22 02:01:17,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-02-22 02:01:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-02-22 02:01:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-22 02:01:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-02-22 02:01:17,781 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 26 [2021-02-22 02:01:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:01:17,782 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-02-22 02:01:17,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:01:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-02-22 02:01:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-22 02:01:17,785 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:01:17,785 INFO L422 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] [2021-02-22 02:01:17,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:01:17,786 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:01:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:01:17,788 INFO L82 PathProgramCache]: Analyzing trace with hash -645452493, now seen corresponding path program 1 times [2021-02-22 02:01:17,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:01:17,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493050499] [2021-02-22 02:01:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:01:17,810 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:01:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:01:17,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:17,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:01:17,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:17,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:01:17,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:17,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-22 02:01:17,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:17,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:01:17,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:17,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:01:17,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:17,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:01:17,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:17,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:01:17,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:01:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:01:17,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:17,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:01:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:01:17,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493050499] [2021-02-22 02:01:17,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:01:17,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-22 02:01:17,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226896100] [2021-02-22 02:01:17,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-22 02:01:17,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:01:17,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-22 02:01:17,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-22 02:01:17,987 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 8 states. [2021-02-22 02:01:18,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:01:18,184 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-02-22 02:01:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-22 02:01:18,185 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2021-02-22 02:01:18,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:01:18,187 INFO L225 Difference]: With dead ends: 84 [2021-02-22 02:01:18,187 INFO L226 Difference]: Without dead ends: 81 [2021-02-22 02:01:18,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-02-22 02:01:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-02-22 02:01:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2021-02-22 02:01:18,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-02-22 02:01:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-02-22 02:01:18,200 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 28 [2021-02-22 02:01:18,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:01:18,201 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-02-22 02:01:18,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-22 02:01:18,201 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-02-22 02:01:18,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 02:01:18,202 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:01:18,203 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:01:18,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:01:18,203 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:01:18,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:01:18,204 INFO L82 PathProgramCache]: Analyzing trace with hash -428196712, now seen corresponding path program 1 times [2021-02-22 02:01:18,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:01:18,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322676115] [2021-02-22 02:01:18,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:01:18,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:01:18,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:01:18,267 WARN L141 QuantifierPusher]: treesize reduction 2, result has 95.6 percent of original size [2021-02-22 02:01:18,282 WARN L147 QuantifierPusher]: treesize reduction 2, result has 95.6 percent of original size 43 [2021-02-22 02:01:18,288 WARN L141 QuantifierPusher]: treesize reduction 18, result has 76.3 percent of original size [2021-02-22 02:01:18,293 INFO L723 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-02-22 02:01:18,298 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:01:18,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-02-22 02:01:18,306 WARN L147 QuantifierPusher]: treesize reduction 18, result has 76.3 percent of original size 58 [2021-02-22 02:01:18,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:01:18,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:01:18,322 WARN L141 QuantifierPusher]: treesize reduction 2, result has 94.9 percent of original size [2021-02-22 02:01:18,324 WARN L147 QuantifierPusher]: treesize reduction 2, result has 94.9 percent of original size 37 [2021-02-22 02:01:18,328 WARN L141 QuantifierPusher]: treesize reduction 18, result has 74.3 percent of original size [2021-02-22 02:01:18,330 INFO L723 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-02-22 02:01:18,332 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:01:18,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-02-22 02:01:18,338 WARN L147 QuantifierPusher]: treesize reduction 18, result has 74.3 percent of original size 52 [2021-02-22 02:01:18,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:01:18,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:01:18,353 WARN L141 QuantifierPusher]: treesize reduction 2, result has 95.6 percent of original size [2021-02-22 02:01:18,356 WARN L147 QuantifierPusher]: treesize reduction 2, result has 95.6 percent of original size 43 [2021-02-22 02:01:18,360 WARN L141 QuantifierPusher]: treesize reduction 18, result has 76.3 percent of original size [2021-02-22 02:01:18,362 INFO L723 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-02-22 02:01:18,364 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:01:18,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-02-22 02:01:18,370 WARN L147 QuantifierPusher]: treesize reduction 18, result has 76.3 percent of original size 58 [2021-02-22 02:01:18,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:01:18,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:01:18,385 WARN L141 QuantifierPusher]: treesize reduction 2, result has 94.9 percent of original size [2021-02-22 02:01:18,388 WARN L147 QuantifierPusher]: treesize reduction 2, result has 94.9 percent of original size 37 [2021-02-22 02:01:18,391 WARN L141 QuantifierPusher]: treesize reduction 18, result has 74.3 percent of original size [2021-02-22 02:01:18,393 INFO L723 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-02-22 02:01:18,395 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:01:18,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:01:18,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-02-22 02:01:18,401 WARN L147 QuantifierPusher]: treesize reduction 18, result has 74.3 percent of original size 52 [2021-02-22 02:01:18,402 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:01:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:01:18,436 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:01:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:01:18,462 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:01:18,519 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:01:18,519 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:01:18,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-22 02:01:18,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:01:18 BoogieIcfgContainer [2021-02-22 02:01:18,544 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:01:18,546 INFO L168 Benchmark]: Toolchain (without parser) took 3662.51 ms. Allocated memory was 162.5 MB in the beginning and 197.1 MB in the end (delta: 34.6 MB). Free memory was 138.2 MB in the beginning and 81.5 MB in the end (delta: 56.7 MB). Peak memory consumption was 92.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:01:18,551 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 162.5 MB. Free memory was 135.4 MB in the beginning and 135.3 MB in the end (delta: 102.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:01:18,552 INFO L168 Benchmark]: CACSL2BoogieTranslator took 634.51 ms. Allocated memory is still 162.5 MB. Free memory was 137.0 MB in the beginning and 113.9 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:01:18,555 INFO L168 Benchmark]: Boogie Preprocessor took 79.50 ms. Allocated memory is still 162.5 MB. Free memory was 113.9 MB in the beginning and 110.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:01:18,560 INFO L168 Benchmark]: RCFGBuilder took 1071.36 ms. Allocated memory is still 162.5 MB. Free memory was 110.8 MB in the beginning and 84.2 MB in the end (delta: 26.5 MB). Peak memory consumption was 25.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:01:18,561 INFO L168 Benchmark]: TraceAbstraction took 1854.46 ms. Allocated memory was 162.5 MB in the beginning and 197.1 MB in the end (delta: 34.6 MB). Free memory was 83.7 MB in the beginning and 81.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 37.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:01:18,569 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 162.5 MB. Free memory was 135.4 MB in the beginning and 135.3 MB in the end (delta: 102.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 634.51 ms. Allocated memory is still 162.5 MB. Free memory was 137.0 MB in the beginning and 113.9 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 79.50 ms. Allocated memory is still 162.5 MB. Free memory was 113.9 MB in the beginning and 110.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1071.36 ms. Allocated memory is still 162.5 MB. Free memory was 110.8 MB in the beginning and 84.2 MB in the end (delta: 26.5 MB). Peak memory consumption was 25.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1854.46 ms. Allocated memory was 162.5 MB in the beginning and 197.1 MB in the end (delta: 34.6 MB). Free memory was 83.7 MB in the beginning and 81.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 37.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 613]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L596] List a = (List) malloc(sizeof(struct node)); [L597] COND FALSE !(a == 0) [L598] List t; [L599] List p = a; [L600] a->h = 2 [L601] COND FALSE !(__VERIFIER_nondet_int()) [L608] p->h = 2 [L609] p->n = 0 [L610] p = a [L611] COND TRUE p!=0 [L612] EXPR p->h [L612] COND FALSE !(p->h != 2) [L615] EXPR p->n [L615] p = p->n [L611] COND TRUE p!=0 [L612] EXPR p->h [L612] COND TRUE p->h != 2 [L613] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 183 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 200 SDtfs, 107 SDslu, 134 SDs, 0 SdLazy, 231 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred 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, 30 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...