/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:42:10,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:42:10,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:42:10,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:42:10,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:42:10,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:42:10,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:42:10,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:42:10,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:42:10,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:42:10,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:42:10,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:42:10,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:42:10,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:42:10,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:42:10,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:42:10,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:42:10,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:42:10,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:42:10,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:42:10,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:42:10,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:42:10,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:42:10,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:42:10,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 16:42:10,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 16:42:10,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 16:42:10,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 16:42:10,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 16:42:10,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 16:42:10,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 16:42:10,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 16:42:10,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 16:42:10,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 16:42:10,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 16:42:10,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 16:42:10,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 16:42:10,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 16:42:10,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:42:10,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:42:10,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:42:10,329 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:42:10,347 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:42:10,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:42:10,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:42:10,350 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:42:10,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:42:10,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:42:10,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:42:10,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:42:10,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:42:10,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:42:10,352 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:42:10,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:42:10,352 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:42:10,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:42:10,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:42:10,353 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:42:10,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:42:10,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:42:10,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:42:10,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:42:10,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:42:10,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:42:10,355 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:42:10,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:42:10,788 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:42:10,795 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:42:10,799 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:42:10,799 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:42:10,800 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-09-04 16:42:10,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa2f44aac/1eec25e3b57348fba7b8bfc5e7dd9d71/FLAG0eb214ec4 [2020-09-04 16:42:11,515 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:42:11,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-09-04 16:42:11,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa2f44aac/1eec25e3b57348fba7b8bfc5e7dd9d71/FLAG0eb214ec4 [2020-09-04 16:42:11,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa2f44aac/1eec25e3b57348fba7b8bfc5e7dd9d71 [2020-09-04 16:42:11,756 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:42:11,758 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:42:11,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:42:11,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:42:11,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:42:11,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:42:11" (1/1) ... [2020-09-04 16:42:11,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c286c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:11, skipping insertion in model container [2020-09-04 16:42:11,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:42:11" (1/1) ... [2020-09-04 16:42:11,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:42:11,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:42:12,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:42:12,351 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:42:12,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:42:12,496 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:42:12,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:12 WrapperNode [2020-09-04 16:42:12,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:42:12,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:42:12,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:42:12,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:42:12,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:12" (1/1) ... [2020-09-04 16:42:12,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:12" (1/1) ... [2020-09-04 16:42:12,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:12" (1/1) ... [2020-09-04 16:42:12,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:12" (1/1) ... [2020-09-04 16:42:12,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:12" (1/1) ... [2020-09-04 16:42:12,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:12" (1/1) ... [2020-09-04 16:42:12,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:12" (1/1) ... [2020-09-04 16:42:12,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:42:12,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:42:12,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:42:12,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:42:12,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 16:42:12,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:42:12,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:42:12,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-04 16:42:12,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-04 16:42:12,655 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-09-04 16:42:12,655 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-09-04 16:42:12,655 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-09-04 16:42:12,656 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-09-04 16:42:12,656 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-04 16:42:12,656 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:42:12,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:42:12,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:42:12,656 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-04 16:42:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-04 16:42:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-04 16:42:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-04 16:42:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-04 16:42:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-04 16:42:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-04 16:42:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-04 16:42:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-04 16:42:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-04 16:42:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-04 16:42:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-04 16:42:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-04 16:42:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-04 16:42:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-04 16:42:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-04 16:42:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-04 16:42:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-04 16:42:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-04 16:42:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-04 16:42:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-04 16:42:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-04 16:42:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-04 16:42:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-04 16:42:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-04 16:42:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-04 16:42:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-04 16:42:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-04 16:42:12,662 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-04 16:42:12,662 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-04 16:42:12,662 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-04 16:42:12,662 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-04 16:42:12,662 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-04 16:42:12,662 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-04 16:42:12,662 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-04 16:42:12,663 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-04 16:42:12,663 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-04 16:42:12,663 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-04 16:42:12,663 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-04 16:42:12,663 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-04 16:42:12,663 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-04 16:42:12,664 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-04 16:42:12,664 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-04 16:42:12,664 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-04 16:42:12,664 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-04 16:42:12,664 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-04 16:42:12,664 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-04 16:42:12,665 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-04 16:42:12,665 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-04 16:42:12,665 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-04 16:42:12,665 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-04 16:42:12,665 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-04 16:42:12,666 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 16:42:12,666 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 16:42:12,666 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 16:42:12,666 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 16:42:12,666 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-04 16:42:12,666 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-04 16:42:12,666 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 16:42:12,667 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-04 16:42:12,667 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-04 16:42:12,667 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 16:42:12,667 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-04 16:42:12,667 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-04 16:42:12,667 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-04 16:42:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 16:42:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-04 16:42:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-04 16:42:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-04 16:42:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-04 16:42:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-04 16:42:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-04 16:42:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-04 16:42:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-04 16:42:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-04 16:42:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-04 16:42:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-04 16:42:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-04 16:42:12,670 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-04 16:42:12,670 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-04 16:42:12,670 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-04 16:42:12,670 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-04 16:42:12,670 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-04 16:42:12,670 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-04 16:42:12,671 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-04 16:42:12,671 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-04 16:42:12,671 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-04 16:42:12,671 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-04 16:42:12,671 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-04 16:42:12,671 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-04 16:42:12,671 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-04 16:42:12,672 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-04 16:42:12,672 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-04 16:42:12,672 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-04 16:42:12,672 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-04 16:42:12,672 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-04 16:42:12,672 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-04 16:42:12,673 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-04 16:42:12,673 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-04 16:42:12,673 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-04 16:42:12,673 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-04 16:42:12,673 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-04 16:42:12,673 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-04 16:42:12,674 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-04 16:42:12,674 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-04 16:42:12,674 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-09-04 16:42:12,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 16:42:12,674 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-09-04 16:42:12,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 16:42:12,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 16:42:12,675 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-09-04 16:42:12,675 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-09-04 16:42:12,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:42:12,675 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-04 16:42:12,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:42:12,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:42:12,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:42:12,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:42:12,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:42:13,047 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-04 16:42:13,410 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:42:13,410 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-04 16:42:13,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:42:13 BoogieIcfgContainer [2020-09-04 16:42:13,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:42:13,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:42:13,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:42:13,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:42:13,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:42:11" (1/3) ... [2020-09-04 16:42:13,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474ee3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:42:13, skipping insertion in model container [2020-09-04 16:42:13,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:12" (2/3) ... [2020-09-04 16:42:13,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474ee3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:42:13, skipping insertion in model container [2020-09-04 16:42:13,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:42:13" (3/3) ... [2020-09-04 16:42:13,434 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2020-09-04 16:42:13,446 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:42:13,461 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:42:13,482 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:42:13,506 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:42:13,506 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:42:13,507 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:42:13,507 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:42:13,507 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:42:13,507 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:42:13,507 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:42:13,508 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:42:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states. [2020-09-04 16:42:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 16:42:13,540 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:13,541 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] [2020-09-04 16:42:13,541 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:13,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:13,548 INFO L82 PathProgramCache]: Analyzing trace with hash -648190388, now seen corresponding path program 1 times [2020-09-04 16:42:13,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:13,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721302897] [2020-09-04 16:42:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:13,670 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:13,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:13,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721302897] [2020-09-04 16:42:13,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:13,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:42:13,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725035249] [2020-09-04 16:42:13,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:42:13,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:13,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:42:13,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:42:13,861 INFO L87 Difference]: Start difference. First operand 157 states. Second operand 3 states. [2020-09-04 16:42:14,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:14,149 INFO L93 Difference]: Finished difference Result 299 states and 333 transitions. [2020-09-04 16:42:14,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:42:14,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-04 16:42:14,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:14,161 INFO L225 Difference]: With dead ends: 299 [2020-09-04 16:42:14,162 INFO L226 Difference]: Without dead ends: 38 [2020-09-04 16:42:14,169 INFO L675 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 [2020-09-04 16:42:14,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-04 16:42:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-09-04 16:42:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-04 16:42:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-04 16:42:14,212 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 22 [2020-09-04 16:42:14,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:14,213 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-04 16:42:14,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:42:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-04 16:42:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 16:42:14,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:14,214 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] [2020-09-04 16:42:14,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:42:14,215 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:14,216 INFO L82 PathProgramCache]: Analyzing trace with hash -388732234, now seen corresponding path program 1 times [2020-09-04 16:42:14,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:14,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63552845] [2020-09-04 16:42:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:14,220 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:14,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:14,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63552845] [2020-09-04 16:42:14,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:14,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 16:42:14,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547820333] [2020-09-04 16:42:14,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 16:42:14,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:14,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 16:42:14,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:42:14,369 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 8 states. [2020-09-04 16:42:14,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:14,572 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-09-04 16:42:14,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 16:42:14,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-09-04 16:42:14,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:14,575 INFO L225 Difference]: With dead ends: 80 [2020-09-04 16:42:14,575 INFO L226 Difference]: Without dead ends: 77 [2020-09-04 16:42:14,576 INFO L675 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 [2020-09-04 16:42:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-04 16:42:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-09-04 16:42:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 16:42:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-09-04 16:42:14,588 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 24 [2020-09-04 16:42:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:14,588 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-09-04 16:42:14,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 16:42:14,588 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-09-04 16:42:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 16:42:14,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:14,590 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] [2020-09-04 16:42:14,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:42:14,590 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:14,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1490085289, now seen corresponding path program 1 times [2020-09-04 16:42:14,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:14,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143709732] [2020-09-04 16:42:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:14,624 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:14,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:14,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143709732] [2020-09-04 16:42:14,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:14,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 16:42:14,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353279747] [2020-09-04 16:42:14,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 16:42:14,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:14,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 16:42:14,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-04 16:42:14,905 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 10 states. [2020-09-04 16:42:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:15,220 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-09-04 16:42:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 16:42:15,221 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-09-04 16:42:15,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:15,222 INFO L225 Difference]: With dead ends: 79 [2020-09-04 16:42:15,222 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 16:42:15,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:42:15,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 16:42:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2020-09-04 16:42:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 16:42:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-09-04 16:42:15,232 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2020-09-04 16:42:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:15,232 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-09-04 16:42:15,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 16:42:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-09-04 16:42:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 16:42:15,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:15,234 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] [2020-09-04 16:42:15,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:42:15,234 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:15,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:15,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2115770941, now seen corresponding path program 1 times [2020-09-04 16:42:15,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:15,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905847263] [2020-09-04 16:42:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:15,247 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:42:15,272 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:42:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:42:15,300 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:42:15,339 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:42:15,339 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:42:15,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:42:15,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:42:15 BoogieIcfgContainer [2020-09-04 16:42:15,363 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:42:15,367 INFO L168 Benchmark]: Toolchain (without parser) took 3608.25 ms. Allocated memory was 141.0 MB in the beginning and 248.5 MB in the end (delta: 107.5 MB). Free memory was 102.6 MB in the beginning and 180.7 MB in the end (delta: -78.1 MB). Peak memory consumption was 29.4 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:15,368 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:42:15,369 INFO L168 Benchmark]: CACSL2BoogieTranslator took 738.24 ms. Allocated memory was 141.0 MB in the beginning and 205.5 MB in the end (delta: 64.5 MB). Free memory was 102.4 MB in the beginning and 170.9 MB in the end (delta: -68.5 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:15,370 INFO L168 Benchmark]: Boogie Preprocessor took 80.63 ms. Allocated memory is still 205.5 MB. Free memory was 170.9 MB in the beginning and 167.7 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:15,371 INFO L168 Benchmark]: RCFGBuilder took 843.94 ms. Allocated memory is still 205.5 MB. Free memory was 167.7 MB in the beginning and 102.6 MB in the end (delta: 65.1 MB). Peak memory consumption was 65.1 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:15,371 INFO L168 Benchmark]: TraceAbstraction took 1938.42 ms. Allocated memory was 205.5 MB in the beginning and 248.5 MB in the end (delta: 43.0 MB). Free memory was 101.9 MB in the beginning and 180.7 MB in the end (delta: -78.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:42:15,376 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 738.24 ms. Allocated memory was 141.0 MB in the beginning and 205.5 MB in the end (delta: 64.5 MB). Free memory was 102.4 MB in the beginning and 170.9 MB in the end (delta: -68.5 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 80.63 ms. Allocated memory is still 205.5 MB. Free memory was 170.9 MB in the beginning and 167.7 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 843.94 ms. Allocated memory is still 205.5 MB. Free memory was 167.7 MB in the beginning and 102.6 MB in the end (delta: 65.1 MB). Peak memory consumption was 65.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1938.42 ms. Allocated memory was 205.5 MB in the beginning and 248.5 MB in the end (delta: 43.0 MB). Free memory was 101.9 MB in the beginning and 180.7 MB in the end (delta: -78.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L585] List a = (List) malloc(sizeof(struct node)); [L586] COND FALSE !(a == 0) [L587] List t; [L588] List p = a; [L589] a->h = 2 [L590] COND TRUE __VERIFIER_nondet_int() [L591] p->h = 1 [L592] t = (List) malloc(sizeof(struct node)) [L593] COND FALSE !(t == 0) [L594] p->n = t [L595] EXPR p->n [L595] p = p->n [L590] COND FALSE !(__VERIFIER_nondet_int()) [L597] p->h = 2 [L598] p->n = 0 [L599] p = a [L600] COND TRUE p!=0 [L601] EXPR p->h [L601] COND TRUE p->h != 2 [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 173 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 216 SDtfs, 253 SDslu, 242 SDs, 0 SdLazy, 342 SolverSat, 33 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, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=157occurred 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...