/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/forester-heap/dll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:38:09,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:38:09,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:38:09,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:38:09,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:38:09,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:38:09,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:38:09,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:38:09,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:38:09,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:38:09,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:38:09,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:38:09,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:38:09,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:38:09,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:38:09,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:38:09,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:38:09,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:38:09,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:38:09,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:38:09,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:38:09,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:38:09,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:38:09,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:38:09,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 20:38:09,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 20:38:09,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 20:38:09,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 20:38:09,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 20:38:09,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 20:38:09,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 20:38:09,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 20:38:09,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 20:38:09,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 20:38:09,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 20:38:09,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 20:38:09,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 20:38:09,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 20:38:09,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:38:09,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:38:09,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:38:09,983 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 20:38:09,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:38:09,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:38:09,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:38:09,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:38:09,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:38:09,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:38:09,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:38:09,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:38:10,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:38:10,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:38:10,000 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:38:10,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:38:10,000 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:38:10,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:38:10,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:38:10,001 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:38:10,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:38:10,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:38:10,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:38:10,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:38:10,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:38:10,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:38:10,003 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:38:10,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:38:10,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:38:10,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:38:10,489 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:38:10,489 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:38:10,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-10-23 20:38:10,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95df1dc92/1c925d23a71c4dc8b6c5853c38cf53c6/FLAGb8b740fe4 [2020-10-23 20:38:11,251 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:38:11,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-10-23 20:38:11,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95df1dc92/1c925d23a71c4dc8b6c5853c38cf53c6/FLAGb8b740fe4 [2020-10-23 20:38:11,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95df1dc92/1c925d23a71c4dc8b6c5853c38cf53c6 [2020-10-23 20:38:11,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:38:11,552 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:38:11,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:38:11,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:38:11,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:38:11,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:38:11" (1/1) ... [2020-10-23 20:38:11,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a929fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:38:11, skipping insertion in model container [2020-10-23 20:38:11,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:38:11" (1/1) ... [2020-10-23 20:38:11,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:38:11,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:38:11,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:38:11,931 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:38:12,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:38:12,096 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:38:12,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:38:12 WrapperNode [2020-10-23 20:38:12,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:38:12,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:38:12,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:38:12,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:38:12,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:38:12" (1/1) ... [2020-10-23 20:38:12,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:38:12" (1/1) ... [2020-10-23 20:38:12,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:38:12" (1/1) ... [2020-10-23 20:38:12,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:38:12" (1/1) ... [2020-10-23 20:38:12,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:38:12" (1/1) ... [2020-10-23 20:38:12,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:38:12" (1/1) ... [2020-10-23 20:38:12,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:38:12" (1/1) ... [2020-10-23 20:38:12,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:38:12,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:38:12,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:38:12,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:38:12,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:38:12" (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 20:38:12,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:38:12,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:38:12,272 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:38:12,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:38:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 20:38:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 20:38:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 20:38:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 20:38:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 20:38:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 20:38:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 20:38:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 20:38:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 20:38:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 20:38:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 20:38:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 20:38:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 20:38:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 20:38:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 20:38:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 20:38:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 20:38:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 20:38:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 20:38:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 20:38:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 20:38:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 20:38:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 20:38:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 20:38:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 20:38:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 20:38:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 20:38:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 20:38:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 20:38:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 20:38:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 20:38:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 20:38:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 20:38:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 20:38:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 20:38:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 20:38:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 20:38:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 20:38:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 20:38:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 20:38:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 20:38:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 20:38:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 20:38:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 20:38:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 20:38:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 20:38:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 20:38:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 20:38:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 20:38:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 20:38:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 20:38:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 20:38:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 20:38:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 20:38:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 20:38:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 20:38:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 20:38:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 20:38:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 20:38:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:38:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 20:38:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 20:38:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 20:38:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 20:38:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 20:38:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 20:38:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 20:38:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 20:38:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 20:38:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 20:38:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 20:38:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 20:38:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 20:38:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 20:38:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 20:38:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 20:38:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 20:38:12,287 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 20:38:12,287 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 20:38:12,287 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 20:38:12,287 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 20:38:12,287 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 20:38:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 20:38:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 20:38:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 20:38:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 20:38:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 20:38:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 20:38:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 20:38:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 20:38:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 20:38:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 20:38:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 20:38:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 20:38:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 20:38:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 20:38:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 20:38:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 20:38:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 20:38:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 20:38:12,291 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 20:38:12,291 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 20:38:12,291 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 20:38:12,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:38:12,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:38:12,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 20:38:12,292 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 20:38:12,292 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:38:12,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:38:12,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:38:12,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 20:38:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 20:38:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:38:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 20:38:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:38:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:38:12,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:38:12,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:38:12,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:38:13,159 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:38:13,160 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-23 20:38:13,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:38:13 BoogieIcfgContainer [2020-10-23 20:38:13,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:38:13,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:38:13,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:38:13,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:38:13,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:38:11" (1/3) ... [2020-10-23 20:38:13,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9ec70d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:38:13, skipping insertion in model container [2020-10-23 20:38:13,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:38:12" (2/3) ... [2020-10-23 20:38:13,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9ec70d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:38:13, skipping insertion in model container [2020-10-23 20:38:13,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:38:13" (3/3) ... [2020-10-23 20:38:13,180 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-2.i [2020-10-23 20:38:13,194 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:38:13,200 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:38:13,216 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:38:13,244 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:38:13,244 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:38:13,245 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:38:13,245 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:38:13,245 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:38:13,245 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:38:13,245 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:38:13,246 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:38:13,265 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2020-10-23 20:38:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 20:38:13,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:38:13,276 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] [2020-10-23 20:38:13,276 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:38:13,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:38:13,283 INFO L82 PathProgramCache]: Analyzing trace with hash -725034452, now seen corresponding path program 1 times [2020-10-23 20:38:13,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:38:13,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725431631] [2020-10-23 20:38:13,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:38:13,400 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:38:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:13,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:38:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:13,591 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 20:38:13,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725431631] [2020-10-23 20:38:13,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:38:13,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 20:38:13,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130494807] [2020-10-23 20:38:13,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 20:38:13,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:38:13,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 20:38:13,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 20:38:13,621 INFO L87 Difference]: Start difference. First operand 109 states. Second operand 3 states. [2020-10-23 20:38:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:38:13,942 INFO L93 Difference]: Finished difference Result 166 states and 204 transitions. [2020-10-23 20:38:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 20:38:13,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-23 20:38:13,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:38:13,956 INFO L225 Difference]: With dead ends: 166 [2020-10-23 20:38:13,957 INFO L226 Difference]: Without dead ends: 80 [2020-10-23 20:38:13,962 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 20:38:13,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-23 20:38:14,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-23 20:38:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-23 20:38:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-10-23 20:38:14,025 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 24 [2020-10-23 20:38:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:38:14,025 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-10-23 20:38:14,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 20:38:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-10-23 20:38:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 20:38:14,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:38:14,027 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] [2020-10-23 20:38:14,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:38:14,028 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:38:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:38:14,029 INFO L82 PathProgramCache]: Analyzing trace with hash -684282970, now seen corresponding path program 1 times [2020-10-23 20:38:14,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:38:14,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644864420] [2020-10-23 20:38:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:38:14,036 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:38:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:14,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:38:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:14,183 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 20:38:14,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644864420] [2020-10-23 20:38:14,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:38:14,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:38:14,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237466890] [2020-10-23 20:38:14,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:38:14,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:38:14,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:38:14,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:38:14,187 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 6 states. [2020-10-23 20:38:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:38:14,482 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2020-10-23 20:38:14,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:38:14,482 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-23 20:38:14,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:38:14,485 INFO L225 Difference]: With dead ends: 110 [2020-10-23 20:38:14,485 INFO L226 Difference]: Without dead ends: 106 [2020-10-23 20:38:14,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:38:14,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-23 20:38:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2020-10-23 20:38:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-23 20:38:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-23 20:38:14,510 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 26 [2020-10-23 20:38:14,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:38:14,511 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-23 20:38:14,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:38:14,511 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-23 20:38:14,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 20:38:14,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:38:14,512 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 20:38:14,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:38:14,513 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:38:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:38:14,513 INFO L82 PathProgramCache]: Analyzing trace with hash -748613476, now seen corresponding path program 1 times [2020-10-23 20:38:14,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:38:14,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61230854] [2020-10-23 20:38:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:38:14,519 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:38:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:14,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:38:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:14,741 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 20:38:14,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61230854] [2020-10-23 20:38:14,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:38:14,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:38:14,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564477725] [2020-10-23 20:38:14,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:38:14,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:38:14,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:38:14,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:38:14,744 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 8 states. [2020-10-23 20:38:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:38:15,177 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2020-10-23 20:38:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:38:15,178 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-23 20:38:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:38:15,180 INFO L225 Difference]: With dead ends: 133 [2020-10-23 20:38:15,180 INFO L226 Difference]: Without dead ends: 128 [2020-10-23 20:38:15,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-23 20:38:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-23 20:38:15,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2020-10-23 20:38:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-23 20:38:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2020-10-23 20:38:15,204 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 30 [2020-10-23 20:38:15,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:38:15,205 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2020-10-23 20:38:15,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:38:15,205 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2020-10-23 20:38:15,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-23 20:38:15,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:38:15,207 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:38:15,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:38:15,207 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:38:15,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:38:15,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2047094719, now seen corresponding path program 1 times [2020-10-23 20:38:15,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:38:15,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972063473] [2020-10-23 20:38:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:38:15,213 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:38:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:38:15,247 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:38:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:38:15,288 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:38:15,339 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:38:15,339 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:38:15,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:38:15,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:38:15 BoogieIcfgContainer [2020-10-23 20:38:15,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:38:15,371 INFO L168 Benchmark]: Toolchain (without parser) took 3820.69 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 134.4 MB in the beginning and 134.3 MB in the end (delta: 106.2 kB). Peak memory consumption was 32.8 MB. Max. memory is 8.0 GB. [2020-10-23 20:38:15,372 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:38:15,374 INFO L168 Benchmark]: CACSL2BoogieTranslator took 540.32 ms. Allocated memory is still 151.0 MB. Free memory was 133.7 MB in the beginning and 124.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:38:15,376 INFO L168 Benchmark]: Boogie Preprocessor took 87.68 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 121.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:38:15,377 INFO L168 Benchmark]: RCFGBuilder took 977.18 ms. Allocated memory is still 151.0 MB. Free memory was 121.7 MB in the beginning and 115.6 MB in the end (delta: 6.0 MB). Peak memory consumption was 37.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:38:15,378 INFO L168 Benchmark]: TraceAbstraction took 2195.96 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 115.1 MB in the beginning and 134.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:38:15,392 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 540.32 ms. Allocated memory is still 151.0 MB. Free memory was 133.7 MB in the beginning and 124.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 87.68 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 121.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 977.18 ms. Allocated memory is still 151.0 MB. Free memory was 121.7 MB in the beginning and 115.6 MB in the end (delta: 6.0 MB). Peak memory consumption was 37.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2195.96 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 115.1 MB in the beginning and 134.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 991]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1005] SLL* list = malloc(sizeof(SLL)); [L1006] list->next = ((void*)0) [L1007] list->prev = ((void*)0) [L1008] list->colour = BLACK [L1010] SLL* end = list; [L1013] COND FALSE !(__VERIFIER_nondet_int()) [L1036] end = ((void*)0) [L1037] end = list [L1040] COND FALSE !(!(((void*)0) != end)) [L1041] EXPR end->colour [L1041] COND FALSE !(!(BLACK == end->colour)) [L1043] COND TRUE ((void*)0) != end [L1045] EXPR end->colour [L1045] COND FALSE !(RED == end->colour) [L1051] EXPR end->next [L1051] COND TRUE !(end->next) [L1051] CALL reach_error() [L991] COND FALSE !(0) [L991] __assert_fail ("0", "dll-rb-cnstr_1-2.c", 11, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 109 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 239 SDtfs, 526 SDslu, 251 SDs, 0 SdLazy, 397 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred 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, 67 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...