/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 05:20:24,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:20:24,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:20:24,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 05:20:24,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 05:20:24,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 05:20:24,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 05:20:24,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 05:20:24,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 05:20:24,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 05:20:24,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 05:20:24,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 05:20:24,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:20:24,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:20:24,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:20:24,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:20:24,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:20:24,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:20:24,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:20:24,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:20:24,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:20:24,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:20:24,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:20:24,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:20:24,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 05:20:24,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 05:20:24,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 05:20:24,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 05:20:24,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 05:20:24,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 05:20:24,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 05:20:24,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 05:20:24,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 05:20:24,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 05:20:24,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 05:20:24,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 05:20:24,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 05:20:24,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 05:20:24,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 05:20:24,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 05:20:24,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 05:20:24,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 05:20:24,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:20:24,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:20:24,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:20:24,473 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:20:24,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:20:24,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:20:24,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:20:24,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:20:24,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:20:24,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:20:24,474 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:20:24,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:20:24,475 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:20:24,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:20:24,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:20:24,475 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:20:24,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:20:24,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:20:24,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:20:24,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:20:24,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:20:24,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:20:24,477 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:20:24,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:20:24,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:20:24,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:20:24,981 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:20:24,982 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:20:24,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-11-07 05:20:25,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbc128447/790feed611bc491b839d0e9fdc5d1c9f/FLAG578369544 [2020-11-07 05:20:25,850 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:20:25,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-11-07 05:20:25,867 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbc128447/790feed611bc491b839d0e9fdc5d1c9f/FLAG578369544 [2020-11-07 05:20:26,028 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbc128447/790feed611bc491b839d0e9fdc5d1c9f [2020-11-07 05:20:26,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:20:26,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:20:26,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:20:26,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:20:26,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:20:26,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:20:26" (1/1) ... [2020-11-07 05:20:26,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d523946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:26, skipping insertion in model container [2020-11-07 05:20:26,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:20:26" (1/1) ... [2020-11-07 05:20:26,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:20:26,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:20:26,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:20:26,509 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:20:26,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:20:26,682 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:20:26,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:26 WrapperNode [2020-11-07 05:20:26,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:20:26,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:20:26,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:20:26,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:20:26,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:26" (1/1) ... [2020-11-07 05:20:26,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:26" (1/1) ... [2020-11-07 05:20:26,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:26" (1/1) ... [2020-11-07 05:20:26,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:26" (1/1) ... [2020-11-07 05:20:26,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:26" (1/1) ... [2020-11-07 05:20:26,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:26" (1/1) ... [2020-11-07 05:20:26,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:26" (1/1) ... [2020-11-07 05:20:26,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:20:26,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:20:26,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:20:26,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:20:26,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:26" (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 [2020-11-07 05:20:26,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:20:26,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:20:26,895 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:20:26,895 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:20:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-07 05:20:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-07 05:20:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-07 05:20:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-07 05:20:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-07 05:20:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-07 05:20:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-07 05:20:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-07 05:20:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-07 05:20:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-07 05:20:26,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-07 05:20:26,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-07 05:20:26,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-07 05:20:26,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-07 05:20:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-07 05:20:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-07 05:20:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-07 05:20:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-07 05:20:26,901 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-07 05:20:26,901 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-07 05:20:26,901 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-07 05:20:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-07 05:20:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-07 05:20:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-07 05:20:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-07 05:20:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-07 05:20:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-07 05:20:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-07 05:20:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-07 05:20:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-07 05:20:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-07 05:20:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-07 05:20:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-07 05:20:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-07 05:20:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-07 05:20:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-07 05:20:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-07 05:20:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-07 05:20:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-07 05:20:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-07 05:20:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-07 05:20:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-07 05:20:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-07 05:20:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-07 05:20:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-07 05:20:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-07 05:20:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-07 05:20:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-07 05:20:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-07 05:20:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-07 05:20:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 05:20:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-07 05:20:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-07 05:20:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-07 05:20:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-07 05:20:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-07 05:20:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-07 05:20:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-07 05:20:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-07 05:20:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:20:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-07 05:20:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-07 05:20:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-07 05:20:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 05:20:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-07 05:20:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-07 05:20:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-07 05:20:26,910 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-07 05:20:26,910 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-07 05:20:26,910 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-07 05:20:26,910 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-07 05:20:26,910 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-07 05:20:26,910 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-07 05:20:26,910 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-07 05:20:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-07 05:20:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-07 05:20:26,912 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-07 05:20:26,912 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-07 05:20:26,912 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-07 05:20:26,912 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-07 05:20:26,913 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-07 05:20:26,913 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-07 05:20:26,913 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-07 05:20:26,914 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-07 05:20:26,914 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-07 05:20:26,914 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-07 05:20:26,915 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-07 05:20:26,915 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-07 05:20:26,915 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-07 05:20:26,916 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-07 05:20:26,916 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-07 05:20:26,916 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-07 05:20:26,916 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-07 05:20:26,916 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-07 05:20:26,916 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-07 05:20:26,916 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-07 05:20:26,916 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-07 05:20:26,917 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-07 05:20:26,917 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-07 05:20:26,917 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-07 05:20:26,917 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-07 05:20:26,917 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-07 05:20:26,917 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-07 05:20:26,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 05:20:26,917 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:20:26,918 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 05:20:26,918 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 05:20:26,918 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:20:26,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:20:26,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:20:26,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 05:20:26,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 05:20:26,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:20:26,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 05:20:26,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:20:26,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:20:26,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:20:26,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:20:26,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:20:27,836 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:20:27,837 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-07 05:20:27,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:20:27 BoogieIcfgContainer [2020-11-07 05:20:27,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:20:27,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:20:27,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:20:27,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:20:27,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:20:26" (1/3) ... [2020-11-07 05:20:27,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f6936d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:20:27, skipping insertion in model container [2020-11-07 05:20:27,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:26" (2/3) ... [2020-11-07 05:20:27,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f6936d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:20:27, skipping insertion in model container [2020-11-07 05:20:27,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:20:27" (3/3) ... [2020-11-07 05:20:27,857 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-2.i [2020-11-07 05:20:27,875 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:20:27,884 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:20:27,898 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:20:27,923 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:20:27,924 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:20:27,924 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:20:27,924 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:20:27,924 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:20:27,924 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:20:27,924 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:20:27,924 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:20:27,942 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2020-11-07 05:20:27,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-07 05:20:27,953 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:20:27,954 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] [2020-11-07 05:20:27,954 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:20:27,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:20:27,961 INFO L82 PathProgramCache]: Analyzing trace with hash -725034452, now seen corresponding path program 1 times [2020-11-07 05:20:27,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:20:27,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818026786] [2020-11-07 05:20:27,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:20:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:20:28,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:20:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:20:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:20:28,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818026786] [2020-11-07 05:20:28,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:20:28,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 05:20:28,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709710674] [2020-11-07 05:20:28,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 05:20:28,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:20:28,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 05:20:28,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 05:20:28,294 INFO L87 Difference]: Start difference. First operand 109 states. Second operand 3 states. [2020-11-07 05:20:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:20:28,566 INFO L93 Difference]: Finished difference Result 166 states and 204 transitions. [2020-11-07 05:20:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 05:20:28,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-11-07 05:20:28,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:20:28,579 INFO L225 Difference]: With dead ends: 166 [2020-11-07 05:20:28,579 INFO L226 Difference]: Without dead ends: 80 [2020-11-07 05:20:28,583 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 [2020-11-07 05:20:28,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-07 05:20:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-11-07 05:20:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-07 05:20:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-11-07 05:20:28,637 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 24 [2020-11-07 05:20:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:20:28,637 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-11-07 05:20:28,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 05:20:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-11-07 05:20:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-07 05:20:28,639 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:20:28,639 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] [2020-11-07 05:20:28,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:20:28,640 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:20:28,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:20:28,641 INFO L82 PathProgramCache]: Analyzing trace with hash -684282970, now seen corresponding path program 1 times [2020-11-07 05:20:28,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:20:28,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659491264] [2020-11-07 05:20:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:20:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:20:28,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:20:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:20:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:20:28,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659491264] [2020-11-07 05:20:28,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:20:28,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 05:20:28,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5443810] [2020-11-07 05:20:28,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 05:20:28,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:20:28,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 05:20:28,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 05:20:28,796 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 6 states. [2020-11-07 05:20:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:20:29,116 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2020-11-07 05:20:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 05:20:29,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-11-07 05:20:29,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:20:29,120 INFO L225 Difference]: With dead ends: 110 [2020-11-07 05:20:29,120 INFO L226 Difference]: Without dead ends: 106 [2020-11-07 05:20:29,122 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 [2020-11-07 05:20:29,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-07 05:20:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2020-11-07 05:20:29,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 05:20:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-11-07 05:20:29,145 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 26 [2020-11-07 05:20:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:20:29,145 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-11-07 05:20:29,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 05:20:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-11-07 05:20:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-07 05:20:29,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:20:29,147 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] [2020-11-07 05:20:29,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:20:29,148 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:20:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:20:29,149 INFO L82 PathProgramCache]: Analyzing trace with hash -748613476, now seen corresponding path program 1 times [2020-11-07 05:20:29,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:20:29,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407820375] [2020-11-07 05:20:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:20:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:20:29,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:20:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:20:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:20:29,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407820375] [2020-11-07 05:20:29,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:20:29,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 05:20:29,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665475931] [2020-11-07 05:20:29,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 05:20:29,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:20:29,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 05:20:29,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 05:20:29,370 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 8 states. [2020-11-07 05:20:29,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:20:29,806 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2020-11-07 05:20:29,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 05:20:29,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-11-07 05:20:29,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:20:29,809 INFO L225 Difference]: With dead ends: 133 [2020-11-07 05:20:29,809 INFO L226 Difference]: Without dead ends: 128 [2020-11-07 05:20:29,810 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 [2020-11-07 05:20:29,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-07 05:20:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2020-11-07 05:20:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 05:20:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2020-11-07 05:20:29,830 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 30 [2020-11-07 05:20:29,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:20:29,831 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2020-11-07 05:20:29,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 05:20:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2020-11-07 05:20:29,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-07 05:20:29,832 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:20:29,833 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] [2020-11-07 05:20:29,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 05:20:29,833 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:20:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:20:29,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2047094719, now seen corresponding path program 1 times [2020-11-07 05:20:29,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:20:29,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938644871] [2020-11-07 05:20:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:20:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:20:29,861 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:20:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:20:29,902 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:20:29,959 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 05:20:29,959 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 05:20:29,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 05:20:30,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:20:30 BoogieIcfgContainer [2020-11-07 05:20:30,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 05:20:30,017 INFO L168 Benchmark]: Toolchain (without parser) took 3982.84 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 118.2 MB in the beginning and 83.3 MB in the end (delta: 34.9 MB). Peak memory consumption was 68.4 MB. Max. memory is 8.0 GB. [2020-11-07 05:20:30,018 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 162.5 MB. Free memory is still 137.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:20:30,019 INFO L168 Benchmark]: CACSL2BoogieTranslator took 642.74 ms. Allocated memory is still 162.5 MB. Free memory was 117.7 MB in the beginning and 136.0 MB in the end (delta: -18.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-11-07 05:20:30,020 INFO L168 Benchmark]: Boogie Preprocessor took 116.18 ms. Allocated memory is still 162.5 MB. Free memory was 136.0 MB in the beginning and 133.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-11-07 05:20:30,020 INFO L168 Benchmark]: RCFGBuilder took 1035.36 ms. Allocated memory is still 162.5 MB. Free memory was 132.9 MB in the beginning and 139.0 MB in the end (delta: -6.0 MB). Peak memory consumption was 48.7 MB. Max. memory is 8.0 GB. [2020-11-07 05:20:30,022 INFO L168 Benchmark]: TraceAbstraction took 2168.35 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 138.5 MB in the beginning and 83.3 MB in the end (delta: 55.2 MB). Peak memory consumption was 88.2 MB. Max. memory is 8.0 GB. [2020-11-07 05:20:30,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 162.5 MB. Free memory is still 137.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 642.74 ms. Allocated memory is still 162.5 MB. Free memory was 117.7 MB in the beginning and 136.0 MB in the end (delta: -18.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 116.18 ms. Allocated memory is still 162.5 MB. Free memory was 136.0 MB in the beginning and 133.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1035.36 ms. Allocated memory is still 162.5 MB. Free memory was 132.9 MB in the beginning and 139.0 MB in the end (delta: -6.0 MB). Peak memory consumption was 48.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2168.35 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 138.5 MB in the beginning and 83.3 MB in the end (delta: 55.2 MB). Peak memory consumption was 88.2 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)); VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1006] list->next = ((void*)0) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1007] list->prev = ((void*)0) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1008] list->colour = BLACK VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1010] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1013] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1036] end = ((void*)0) VAL [end={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1037] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1040] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1041] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1041] COND FALSE !(!(BLACK == end->colour)) VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1043] COND TRUE ((void*)0) != end VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1045] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1045] COND FALSE !(RED == end->colour) VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1051] EXPR end->next VAL [end={-1:0}, end->next={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1051] COND TRUE !(end->next) VAL [end={-1:0}, end->next={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 77 ConstructedInterpolants, 0 QuantifiedInterpolants, 7742 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...