/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:42:05,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:42:05,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:42:05,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:42:05,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:42:05,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:42:05,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:42:05,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:42:05,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:42:05,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:42:05,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:42:05,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:42:05,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:42:05,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:42:05,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:42:05,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:42:05,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:42:05,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:42:05,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:42:05,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:42:06,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:42:06,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:42:06,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:42:06,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:42:06,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 20:42:06,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 20:42:06,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 20:42:06,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 20:42:06,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 20:42:06,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 20:42:06,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 20:42:06,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 20:42:06,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 20:42:06,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 20:42:06,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 20:42:06,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 20:42:06,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 20:42:06,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 20:42:06,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:42:06,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:42:06,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:42:06,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:42:06,033 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:42:06,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:42:06,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:42:06,035 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:42:06,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:42:06,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:42:06,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:42:06,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:42:06,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:42:06,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:42:06,036 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:42:06,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:42:06,037 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:42:06,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:42:06,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:42:06,037 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:42:06,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:42:06,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:42:06,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:42:06,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:42:06,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:42:06,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:42:06,039 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:42:06,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:42:06,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:42:06,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:42:06,448 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:42:06,449 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:42:06,450 INFO L432 ainManager$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 [2021-02-21 20:42:06,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c744736f/657267e5e92049fdb299af88521aa927/FLAG06eae9ebf [2021-02-21 20:42:07,208 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:42:07,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2021-02-21 20:42:07,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c744736f/657267e5e92049fdb299af88521aa927/FLAG06eae9ebf [2021-02-21 20:42:07,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c744736f/657267e5e92049fdb299af88521aa927 [2021-02-21 20:42:07,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:42:07,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:42:07,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:42:07,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:42:07,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:42:07,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:42:07" (1/1) ... [2021-02-21 20:42:07,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e92bf0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:07, skipping insertion in model container [2021-02-21 20:42:07,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:42:07" (1/1) ... [2021-02-21 20:42:07,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:42:07,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:42:08,087 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] [2021-02-21 20:42:08,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:42:08,110 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:42:08,204 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] [2021-02-21 20:42:08,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:42:08,278 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:42:08,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:08 WrapperNode [2021-02-21 20:42:08,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:42:08,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:42:08,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:42:08,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:42:08,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:08" (1/1) ... [2021-02-21 20:42:08,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:08" (1/1) ... [2021-02-21 20:42:08,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:08" (1/1) ... [2021-02-21 20:42:08,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:08" (1/1) ... [2021-02-21 20:42:08,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:08" (1/1) ... [2021-02-21 20:42:08,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:08" (1/1) ... [2021-02-21 20:42:08,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:08" (1/1) ... [2021-02-21 20:42:08,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:42:08,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:42:08,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:42:08,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:42:08,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:08" (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 20:42:08,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:42:08,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:42:08,479 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:42:08,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-21 20:42:08,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-21 20:42:08,480 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2021-02-21 20:42:08,480 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2021-02-21 20:42:08,480 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2021-02-21 20:42:08,480 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2021-02-21 20:42:08,480 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-21 20:42:08,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:42:08,481 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:42:08,481 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:42:08,481 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 20:42:08,481 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 20:42:08,481 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:42:08,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:42:08,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:42:08,482 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-21 20:42:08,482 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-21 20:42:08,482 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-21 20:42:08,482 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-21 20:42:08,483 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-21 20:42:08,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-21 20:42:08,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-21 20:42:08,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-21 20:42:08,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-21 20:42:08,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-21 20:42:08,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-21 20:42:08,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-21 20:42:08,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-21 20:42:08,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-21 20:42:08,484 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-21 20:42:08,484 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-21 20:42:08,484 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-21 20:42:08,485 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-21 20:42:08,485 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-21 20:42:08,485 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-21 20:42:08,485 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-21 20:42:08,485 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-21 20:42:08,485 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-21 20:42:08,485 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-21 20:42:08,486 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-21 20:42:08,486 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-21 20:42:08,486 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-21 20:42:08,486 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-21 20:42:08,486 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-21 20:42:08,486 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-21 20:42:08,486 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-21 20:42:08,486 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-21 20:42:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-21 20:42:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-21 20:42:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-21 20:42:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-21 20:42:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-21 20:42:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-21 20:42:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-21 20:42:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-21 20:42:08,488 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-21 20:42:08,488 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-21 20:42:08,488 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-21 20:42:08,488 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-21 20:42:08,488 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-21 20:42:08,488 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-21 20:42:08,488 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-21 20:42:08,489 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-21 20:42:08,489 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-21 20:42:08,489 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-21 20:42:08,489 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-21 20:42:08,489 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-21 20:42:08,489 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 20:42:08,489 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-21 20:42:08,490 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-21 20:42:08,490 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-21 20:42:08,490 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-21 20:42:08,490 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-21 20:42:08,490 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-21 20:42:08,490 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-21 20:42:08,490 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-21 20:42:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-21 20:42:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-21 20:42:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-21 20:42:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-21 20:42:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-21 20:42:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-21 20:42:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-21 20:42:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-21 20:42:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-21 20:42:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-21 20:42:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-21 20:42:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-21 20:42:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-21 20:42:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-21 20:42:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-21 20:42:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-21 20:42:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-21 20:42:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-21 20:42:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-21 20:42:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-21 20:42:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-21 20:42:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-21 20:42:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-21 20:42:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-21 20:42:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-21 20:42:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-21 20:42:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-21 20:42:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-21 20:42:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-21 20:42:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-21 20:42:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-21 20:42:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-21 20:42:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-21 20:42:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-21 20:42:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-21 20:42:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-21 20:42:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-21 20:42:08,496 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-21 20:42:08,496 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-21 20:42:08,496 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-21 20:42:08,496 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-21 20:42:08,496 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-21 20:42:08,496 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-21 20:42:08,496 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2021-02-21 20:42:08,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 20:42:08,497 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2021-02-21 20:42:08,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 20:42:08,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 20:42:08,497 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2021-02-21 20:42:08,497 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2021-02-21 20:42:08,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:42:08,497 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-21 20:42:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:42:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:42:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:42:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:42:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:42:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:42:08,836 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-21 20:42:09,268 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:42:09,268 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-21 20:42:09,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:42:09 BoogieIcfgContainer [2021-02-21 20:42:09,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:42:09,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:42:09,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:42:09,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:42:09,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:42:07" (1/3) ... [2021-02-21 20:42:09,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2d8998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:42:09, skipping insertion in model container [2021-02-21 20:42:09,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:08" (2/3) ... [2021-02-21 20:42:09,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2d8998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:42:09, skipping insertion in model container [2021-02-21 20:42:09,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:42:09" (3/3) ... [2021-02-21 20:42:09,280 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2021-02-21 20:42:09,287 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:42:09,293 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:42:09,314 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:42:09,339 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:42:09,339 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:42:09,339 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:42:09,339 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:42:09,339 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:42:09,339 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:42:09,340 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:42:09,340 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:42:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states. [2021-02-21 20:42:09,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 20:42:09,369 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:09,370 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] [2021-02-21 20:42:09,371 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:09,378 INFO L82 PathProgramCache]: Analyzing trace with hash 982825577, now seen corresponding path program 1 times [2021-02-21 20:42:09,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:09,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927092494] [2021-02-21 20:42:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:09,474 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:09,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:09,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:09,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:09,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:09,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:09,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:09,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:09,648 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 20:42:09,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927092494] [2021-02-21 20:42:09,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:09,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 20:42:09,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609561466] [2021-02-21 20:42:09,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 20:42:09,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:09,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 20:42:09,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 20:42:09,706 INFO L87 Difference]: Start difference. First operand 162 states. Second operand 3 states. [2021-02-21 20:42:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:10,015 INFO L93 Difference]: Finished difference Result 304 states and 338 transitions. [2021-02-21 20:42:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 20:42:10,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2021-02-21 20:42:10,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:10,026 INFO L225 Difference]: With dead ends: 304 [2021-02-21 20:42:10,026 INFO L226 Difference]: Without dead ends: 42 [2021-02-21 20:42:10,031 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 20:42:10,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-02-21 20:42:10,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-02-21 20:42:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-21 20:42:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-02-21 20:42:10,076 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 26 [2021-02-21 20:42:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:10,076 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-02-21 20:42:10,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 20:42:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-02-21 20:42:10,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 20:42:10,078 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:10,078 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] [2021-02-21 20:42:10,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:42:10,079 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:10,080 INFO L82 PathProgramCache]: Analyzing trace with hash -645452493, now seen corresponding path program 1 times [2021-02-21 20:42:10,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:10,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401995079] [2021-02-21 20:42:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:10,086 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:10,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:10,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:10,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 20:42:10,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:10,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:10,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:10,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:10,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:10,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:10,251 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 20:42:10,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401995079] [2021-02-21 20:42:10,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:10,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:42:10,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597708974] [2021-02-21 20:42:10,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:42:10,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:10,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:42:10,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:42:10,255 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 8 states. [2021-02-21 20:42:10,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:10,431 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-02-21 20:42:10,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-21 20:42:10,432 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2021-02-21 20:42:10,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:10,434 INFO L225 Difference]: With dead ends: 84 [2021-02-21 20:42:10,434 INFO L226 Difference]: Without dead ends: 81 [2021-02-21 20:42:10,435 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 [2021-02-21 20:42:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-02-21 20:42:10,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2021-02-21 20:42:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-02-21 20:42:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-02-21 20:42:10,446 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 28 [2021-02-21 20:42:10,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:10,447 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-02-21 20:42:10,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:42:10,447 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-02-21 20:42:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-21 20:42:10,448 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:10,449 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] [2021-02-21 20:42:10,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:42:10,449 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:10,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:10,450 INFO L82 PathProgramCache]: Analyzing trace with hash -428196712, now seen corresponding path program 1 times [2021-02-21 20:42:10,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:10,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308462310] [2021-02-21 20:42:10,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:10,479 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:10,483 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:10,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:10,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:10,577 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:10,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 20:42:10,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-21 20:42:10,607 WARN L141 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-02-21 20:42:10,607 WARN L147 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size 22 [2021-02-21 20:42:10,637 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:10,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:10,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:10,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:10,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:10,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:10,698 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 20:42:10,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308462310] [2021-02-21 20:42:10,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:10,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 20:42:10,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511703976] [2021-02-21 20:42:10,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 20:42:10,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:10,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 20:42:10,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-21 20:42:10,700 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 10 states. [2021-02-21 20:42:10,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:10,957 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-02-21 20:42:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 20:42:10,958 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2021-02-21 20:42:10,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:10,959 INFO L225 Difference]: With dead ends: 83 [2021-02-21 20:42:10,959 INFO L226 Difference]: Without dead ends: 61 [2021-02-21 20:42:10,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-02-21 20:42:10,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-21 20:42:10,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2021-02-21 20:42:10,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-21 20:42:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-02-21 20:42:10,969 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 35 [2021-02-21 20:42:10,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:10,970 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-02-21 20:42:10,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 20:42:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-02-21 20:42:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-21 20:42:10,971 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:10,971 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-02-21 20:42:10,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:42:10,972 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:10,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1998054285, now seen corresponding path program 1 times [2021-02-21 20:42:10,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:10,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974477720] [2021-02-21 20:42:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:10,994 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:10,997 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:42:11,022 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:42:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:42:11,048 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:42:11,091 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:42:11,091 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:42:11,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:42:11,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:42:11 BoogieIcfgContainer [2021-02-21 20:42:11,110 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:42:11,112 INFO L168 Benchmark]: Toolchain (without parser) took 3563.61 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 127.7 MB in the beginning and 94.3 MB in the end (delta: 33.4 MB). Peak memory consumption was 65.9 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:11,112 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 126.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:42:11,113 INFO L168 Benchmark]: CACSL2BoogieTranslator took 715.01 ms. Allocated memory is still 153.1 MB. Free memory was 126.7 MB in the beginning and 103.4 MB in the end (delta: 23.3 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:11,114 INFO L168 Benchmark]: Boogie Preprocessor took 75.08 ms. Allocated memory is still 153.1 MB. Free memory was 103.4 MB in the beginning and 100.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:11,115 INFO L168 Benchmark]: RCFGBuilder took 898.77 ms. Allocated memory is still 153.1 MB. Free memory was 135.9 MB in the beginning and 74.1 MB in the end (delta: 61.9 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:11,116 INFO L168 Benchmark]: TraceAbstraction took 1837.47 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 73.5 MB in the beginning and 94.3 MB in the end (delta: -20.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:11,119 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 126.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 715.01 ms. Allocated memory is still 153.1 MB. Free memory was 126.7 MB in the beginning and 103.4 MB in the end (delta: 23.3 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.08 ms. Allocated memory is still 153.1 MB. Free memory was 103.4 MB in the beginning and 100.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 898.77 ms. Allocated memory is still 153.1 MB. Free memory was 135.9 MB in the beginning and 74.1 MB in the end (delta: 61.9 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1837.47 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 73.5 MB in the beginning and 94.3 MB in the end (delta: -20.8 MB). Peak memory consumption was 10.1 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 TRUE __VERIFIER_nondet_int() [L602] p->h = 1 [L603] t = (List) malloc(sizeof(struct node)) [L604] COND FALSE !(t == 0) [L605] p->n = t [L606] EXPR p->n [L606] p = p->n [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 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: 4, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 228 SDtfs, 253 SDslu, 274 SDs, 0 SdLazy, 358 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s 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, 3 MinimizatonAttempts, 47 StatesRemovedByMinimization, 2 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...