/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 0.2.0-b8ad66e [2020-10-23 20:39:33,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:39:33,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:39:33,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:39:33,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:39:33,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:39:33,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:39:33,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:39:33,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:39:33,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:39:33,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:39:33,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:39:33,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:39:33,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:39:33,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:39:33,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:39:33,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:39:33,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:39:33,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:39:33,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:39:33,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:39:33,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:39:33,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:39:33,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:39:33,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 20:39:33,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 20:39:33,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 20:39:33,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 20:39:33,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 20:39:33,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 20:39:33,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 20:39:33,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 20:39:33,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 20:39:33,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 20:39:33,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 20:39:33,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 20:39:33,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 20:39:33,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 20:39:33,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:39:33,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:39:33,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:39:33,979 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:39:33,992 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:39:33,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:39:33,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:39:33,994 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:39:33,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:39:33,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:39:33,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:39:33,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:39:33,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:39:33,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:39:33,996 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:39:33,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:39:33,997 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:39:33,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:39:33,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:39:33,997 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:39:33,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:39:33,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:39:33,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:39:33,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:39:33,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:39:33,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:39:33,999 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:39:34,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:39:34,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:39:34,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:39:34,428 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:39:34,428 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:39:34,429 INFO L432 ainManager$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 [2020-10-23 20:39:34,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/763fe5440/6d657e8ca5274ffb8608b5a4d9123183/FLAGc97c82f90 [2020-10-23 20:39:35,323 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:39:35,325 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-10-23 20:39:35,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/763fe5440/6d657e8ca5274ffb8608b5a4d9123183/FLAGc97c82f90 [2020-10-23 20:39:35,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/763fe5440/6d657e8ca5274ffb8608b5a4d9123183 [2020-10-23 20:39:35,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:39:35,589 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:39:35,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:39:35,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:39:35,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:39:35,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:39:35" (1/1) ... [2020-10-23 20:39:35,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13743b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:35, skipping insertion in model container [2020-10-23 20:39:35,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:39:35" (1/1) ... [2020-10-23 20:39:35,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:39:35,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:39:36,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:39:36,095 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:39:36,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:39:36,242 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:39:36,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:36 WrapperNode [2020-10-23 20:39:36,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:39:36,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:39:36,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:39:36,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:39:36,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:36" (1/1) ... [2020-10-23 20:39:36,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:36" (1/1) ... [2020-10-23 20:39:36,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:36" (1/1) ... [2020-10-23 20:39:36,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:36" (1/1) ... [2020-10-23 20:39:36,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:36" (1/1) ... [2020-10-23 20:39:36,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:36" (1/1) ... [2020-10-23 20:39:36,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:36" (1/1) ... [2020-10-23 20:39:36,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:39:36,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:39:36,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:39:36,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:39:36,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:36" (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 [2020-10-23 20:39:36,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:39:36,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:39:36,445 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:39:36,445 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-23 20:39:36,445 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-23 20:39:36,445 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-10-23 20:39:36,445 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-10-23 20:39:36,446 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-10-23 20:39:36,446 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-10-23 20:39:36,446 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-23 20:39:36,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:39:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:39:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:39:36,447 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 20:39:36,447 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 20:39:36,447 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:39:36,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:39:36,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:39:36,449 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 20:39:36,449 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 20:39:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 20:39:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 20:39:36,453 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 20:39:36,453 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 20:39:36,453 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 20:39:36,454 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 20:39:36,454 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 20:39:36,455 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 20:39:36,455 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 20:39:36,455 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 20:39:36,455 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 20:39:36,455 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 20:39:36,455 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 20:39:36,456 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 20:39:36,460 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-23 20:39:36,460 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-23 20:39:36,460 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 20:39:36,460 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 20:39:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 20:39:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 20:39:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 20:39:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 20:39:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 20:39:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 20:39:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 20:39:36,462 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 20:39:36,462 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 20:39:36,462 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 20:39:36,462 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 20:39:36,462 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 20:39:36,462 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 20:39:36,462 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 20:39:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 20:39:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 20:39:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 20:39:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 20:39:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 20:39:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 20:39:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 20:39:36,464 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 20:39:36,464 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 20:39:36,465 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 20:39:36,466 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 20:39:36,466 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 20:39:36,466 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 20:39:36,466 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 20:39:36,466 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 20:39:36,466 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 20:39:36,466 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 20:39:36,467 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 20:39:36,467 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 20:39:36,467 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 20:39:36,467 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 20:39:36,467 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 20:39:36,468 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 20:39:36,468 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 20:39:36,468 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 20:39:36,468 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 20:39:36,468 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 20:39:36,468 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 20:39:36,469 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 20:39:36,469 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 20:39:36,469 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 20:39:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 20:39:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 20:39:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 20:39:36,471 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 20:39:36,472 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 20:39:36,472 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 20:39:36,472 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 20:39:36,472 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 20:39:36,472 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 20:39:36,473 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 20:39:36,473 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 20:39:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 20:39:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 20:39:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 20:39:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 20:39:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 20:39:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 20:39:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 20:39:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 20:39:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 20:39:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 20:39:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 20:39:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 20:39:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 20:39:36,476 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 20:39:36,476 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 20:39:36,476 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 20:39:36,476 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 20:39:36,476 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 20:39:36,476 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 20:39:36,476 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 20:39:36,476 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 20:39:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 20:39:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 20:39:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 20:39:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 20:39:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 20:39:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 20:39:36,478 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 20:39:36,478 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-10-23 20:39:36,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 20:39:36,478 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-10-23 20:39:36,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 20:39:36,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 20:39:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-10-23 20:39:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-10-23 20:39:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:39:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-23 20:39:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:39:36,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:39:36,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:39:36,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:39:36,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:39:36,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:39:36,887 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-23 20:39:37,246 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:39:37,246 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-23 20:39:37,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:39:37 BoogieIcfgContainer [2020-10-23 20:39:37,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:39:37,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:39:37,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:39:37,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:39:37,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:39:35" (1/3) ... [2020-10-23 20:39:37,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3239df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:39:37, skipping insertion in model container [2020-10-23 20:39:37,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:36" (2/3) ... [2020-10-23 20:39:37,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3239df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:39:37, skipping insertion in model container [2020-10-23 20:39:37,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:39:37" (3/3) ... [2020-10-23 20:39:37,259 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2020-10-23 20:39:37,273 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:39:37,279 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:39:37,295 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:39:37,321 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:39:37,321 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:39:37,322 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:39:37,322 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:39:37,322 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:39:37,322 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:39:37,322 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:39:37,322 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:39:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states. [2020-10-23 20:39:37,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 20:39:37,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:37,356 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] [2020-10-23 20:39:37,356 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:37,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1897845460, now seen corresponding path program 1 times [2020-10-23 20:39:37,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:37,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400964106] [2020-10-23 20:39:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:37,470 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:37,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:37,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400964106] [2020-10-23 20:39:37,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:37,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 20:39:37,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008100161] [2020-10-23 20:39:37,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 20:39:37,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:37,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 20:39:37,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 20:39:37,691 INFO L87 Difference]: Start difference. First operand 167 states. Second operand 3 states. [2020-10-23 20:39:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:38,070 INFO L93 Difference]: Finished difference Result 311 states and 348 transitions. [2020-10-23 20:39:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 20:39:38,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-23 20:39:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:38,081 INFO L225 Difference]: With dead ends: 311 [2020-10-23 20:39:38,081 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 20:39:38,087 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 [2020-10-23 20:39:38,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 20:39:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 20:39:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 20:39:38,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-23 20:39:38,131 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 28 [2020-10-23 20:39:38,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:38,132 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-23 20:39:38,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 20:39:38,132 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-23 20:39:38,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 20:39:38,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:38,134 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, 1, 1] [2020-10-23 20:39:38,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:39:38,135 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:38,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:38,136 INFO L82 PathProgramCache]: Analyzing trace with hash -690433578, now seen corresponding path program 1 times [2020-10-23 20:39:38,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:38,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891953534] [2020-10-23 20:39:38,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:38,142 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:38,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:38,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891953534] [2020-10-23 20:39:38,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:38,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:39:38,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861836584] [2020-10-23 20:39:38,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:39:38,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:38,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:39:38,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:39:38,360 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 8 states. [2020-10-23 20:39:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:38,582 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-10-23 20:39:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:39:38,582 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-23 20:39:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:38,586 INFO L225 Difference]: With dead ends: 86 [2020-10-23 20:39:38,586 INFO L226 Difference]: Without dead ends: 81 [2020-10-23 20:39:38,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:39:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-23 20:39:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 53. [2020-10-23 20:39:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 20:39:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-23 20:39:38,601 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 30 [2020-10-23 20:39:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:38,601 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-23 20:39:38,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:39:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-23 20:39:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 20:39:38,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:38,603 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, 1, 1] [2020-10-23 20:39:38,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:39:38,604 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:38,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1978859231, now seen corresponding path program 1 times [2020-10-23 20:39:38,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:38,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345966830] [2020-10-23 20:39:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:38,749 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:38,754 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:39,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:39,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345966830] [2020-10-23 20:39:39,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:39,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:39:39,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221553059] [2020-10-23 20:39:39,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:39:39,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:39,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:39:39,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:39:39,056 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 10 states. [2020-10-23 20:39:39,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:39,465 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2020-10-23 20:39:39,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:39:39,465 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-23 20:39:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:39,467 INFO L225 Difference]: With dead ends: 86 [2020-10-23 20:39:39,467 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 20:39:39,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:39:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 20:39:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-10-23 20:39:39,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 20:39:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-23 20:39:39,478 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 37 [2020-10-23 20:39:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:39,479 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-23 20:39:39,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:39:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-23 20:39:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 20:39:39,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:39,481 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, 1, 1] [2020-10-23 20:39:39,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:39:39,481 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:39,482 INFO L82 PathProgramCache]: Analyzing trace with hash -590800653, now seen corresponding path program 1 times [2020-10-23 20:39:39,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:39,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446774652] [2020-10-23 20:39:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:39,748 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:39:39,797 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:39:39,885 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:39,900 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:39:39,969 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:39,971 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:39:39,972 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:40,287 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:39:40,304 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:39:40,384 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:40,393 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:39:40,460 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:40,463 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:39:40,463 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:40,569 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:40,573 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:39:40,596 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:39:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:39:40,620 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:39:40,663 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:39:40,663 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:39:40,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:39:40,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:39:40 BoogieIcfgContainer [2020-10-23 20:39:40,683 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:39:40,685 INFO L168 Benchmark]: Toolchain (without parser) took 5100.04 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 125.1 MB in the beginning and 146.8 MB in the end (delta: -21.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:39:40,686 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:39:40,687 INFO L168 Benchmark]: CACSL2BoogieTranslator took 650.85 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 101.5 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:39:40,688 INFO L168 Benchmark]: Boogie Preprocessor took 83.25 ms. Allocated memory is still 151.0 MB. Free memory was 101.5 MB in the beginning and 98.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:39:40,689 INFO L168 Benchmark]: RCFGBuilder took 919.23 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 98.3 MB in the beginning and 155.9 MB in the end (delta: -57.6 MB). Peak memory consumption was 26.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:39:40,690 INFO L168 Benchmark]: TraceAbstraction took 3432.31 ms. Allocated memory is still 181.4 MB. Free memory was 155.4 MB in the beginning and 146.8 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:39:40,694 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 650.85 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 101.5 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 83.25 ms. Allocated memory is still 151.0 MB. Free memory was 101.5 MB in the beginning and 98.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 919.23 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 98.3 MB in the beginning and 155.9 MB in the end (delta: -57.6 MB). Peak memory consumption was 26.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3432.31 ms. Allocated memory is still 181.4 MB. Free memory was 155.4 MB in the beginning and 146.8 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "simple_and_skiplist_2lvl-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 183 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.3s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 252 SDslu, 273 SDs, 0 SdLazy, 374 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=167occurred 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, 44 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...