/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-circular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:30:23,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:30:23,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:30:23,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:30:23,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:30:23,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:30:23,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:30:23,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:30:23,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:30:23,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:30:23,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:30:23,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:30:23,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:30:23,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:30:23,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:30:23,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:30:23,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:30:23,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:30:23,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:30:23,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:30:23,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:30:23,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:30:23,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:30:23,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:30:23,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:30:23,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:30:23,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:30:23,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:30:23,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:30:23,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:30:23,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:30:23,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:30:23,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:30:23,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:30:23,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:30:23,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:30:23,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:30:23,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:30:23,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:30:23,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:30:23,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:30:23,699 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:30:23,766 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:30:23,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:30:23,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:30:23,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:30:23,771 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:30:23,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:30:23,772 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:30:23,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:30:23,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:30:23,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:30:23,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:30:23,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:30:23,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:30:23,775 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:30:23,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:30:23,776 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:30:23,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:30:23,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:30:23,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:30:23,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:30:23,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:30:23,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:30:23,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:30:23,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:30:23,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:30:23,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:30:23,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:30:23,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:30:23,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:30:23,781 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:30:24,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:30:24,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:30:24,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:30:24,235 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:30:24,236 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:30:24,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-circular-1.i [2020-11-06 22:30:24,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2073600c/e05530d162a94e19b0e3caf9801d1630/FLAGdd8c9aaa7 [2020-11-06 22:30:24,939 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:30:24,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i [2020-11-06 22:30:24,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2073600c/e05530d162a94e19b0e3caf9801d1630/FLAGdd8c9aaa7 [2020-11-06 22:30:25,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2073600c/e05530d162a94e19b0e3caf9801d1630 [2020-11-06 22:30:25,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:30:25,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:30:25,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:30:25,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:30:25,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:30:25,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:25" (1/1) ... [2020-11-06 22:30:25,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e08e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:25, skipping insertion in model container [2020-11-06 22:30:25,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:25" (1/1) ... [2020-11-06 22:30:25,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:30:25,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:30:25,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:30:25,620 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:30:25,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:30:25,731 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:30:25,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:25 WrapperNode [2020-11-06 22:30:25,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:30:25,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:30:25,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:30:25,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:30:25,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:25" (1/1) ... [2020-11-06 22:30:25,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:25" (1/1) ... [2020-11-06 22:30:25,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:25" (1/1) ... [2020-11-06 22:30:25,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:25" (1/1) ... [2020-11-06 22:30:25,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:25" (1/1) ... [2020-11-06 22:30:25,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:25" (1/1) ... [2020-11-06 22:30:25,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:25" (1/1) ... [2020-11-06 22:30:25,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:30:25,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:30:25,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:30:25,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:30:25,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:25" (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 [2020-11-06 22:30:25,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:30:25,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:30:25,893 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:30:25,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:30:25,893 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-06 22:30:25,893 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-06 22:30:25,893 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-06 22:30:25,894 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-06 22:30:25,894 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-06 22:30:25,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-06 22:30:25,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-06 22:30:25,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-06 22:30:25,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-06 22:30:25,895 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-06 22:30:25,895 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-06 22:30:25,895 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-06 22:30:25,895 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-06 22:30:25,895 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-06 22:30:25,896 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-06 22:30:25,896 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-06 22:30:25,896 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-06 22:30:25,896 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-06 22:30:25,896 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-06 22:30:25,896 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-06 22:30:25,897 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-06 22:30:25,897 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-06 22:30:25,897 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-06 22:30:25,897 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-06 22:30:25,897 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-06 22:30:25,897 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-06 22:30:25,898 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-06 22:30:25,898 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-06 22:30:25,898 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-06 22:30:25,898 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-06 22:30:25,898 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-06 22:30:25,898 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-06 22:30:25,898 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-06 22:30:25,899 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-06 22:30:25,899 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-06 22:30:25,899 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-06 22:30:25,899 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-06 22:30:25,899 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-06 22:30:25,899 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-06 22:30:25,900 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-06 22:30:25,900 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-06 22:30:25,900 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-06 22:30:25,900 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-06 22:30:25,900 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-06 22:30:25,900 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-06 22:30:25,900 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-06 22:30:25,901 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-06 22:30:25,901 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-06 22:30:25,901 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-06 22:30:25,901 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-06 22:30:25,901 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:30:25,901 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-06 22:30:25,902 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-06 22:30:25,902 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-06 22:30:25,902 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-06 22:30:25,902 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-06 22:30:25,902 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-06 22:30:25,902 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-06 22:30:25,903 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-06 22:30:25,903 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:30:25,903 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-06 22:30:25,903 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-06 22:30:25,903 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-06 22:30:25,903 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-06 22:30:25,904 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-06 22:30:25,904 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-06 22:30:25,904 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-06 22:30:25,904 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-06 22:30:25,904 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-06 22:30:25,904 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-06 22:30:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-06 22:30:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-06 22:30:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-06 22:30:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-06 22:30:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-06 22:30:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-06 22:30:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-06 22:30:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-06 22:30:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-06 22:30:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-06 22:30:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-06 22:30:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-06 22:30:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-06 22:30:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-06 22:30:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-06 22:30:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-06 22:30:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-06 22:30:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-06 22:30:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-06 22:30:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-06 22:30:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-06 22:30:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-06 22:30:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-06 22:30:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-06 22:30:25,909 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-06 22:30:25,909 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-06 22:30:25,909 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-06 22:30:25,909 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-06 22:30:25,909 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-06 22:30:25,909 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-06 22:30:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-06 22:30:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-06 22:30:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-06 22:30:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:30:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:30:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:30:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:30:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:30:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:30:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:30:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-06 22:30:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-06 22:30:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:30:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-06 22:30:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:30:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:30:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:30:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:30:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:30:26,438 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:30:26,438 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-06 22:30:26,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:26 BoogieIcfgContainer [2020-11-06 22:30:26,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:30:26,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:30:26,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:30:26,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:30:26,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:25" (1/3) ... [2020-11-06 22:30:26,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61cbac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:26, skipping insertion in model container [2020-11-06 22:30:26,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:25" (2/3) ... [2020-11-06 22:30:26,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61cbac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:26, skipping insertion in model container [2020-11-06 22:30:26,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:26" (3/3) ... [2020-11-06 22:30:26,450 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-circular-1.i [2020-11-06 22:30:26,468 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:30:26,473 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:30:26,489 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:30:26,520 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:30:26,520 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:30:26,521 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:30:26,521 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:30:26,521 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:30:26,521 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:30:26,521 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:30:26,521 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:30:26,541 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-11-06 22:30:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:30:26,547 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:26,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:26,548 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:26,555 INFO L82 PathProgramCache]: Analyzing trace with hash -323057978, now seen corresponding path program 1 times [2020-11-06 22:30:26,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:26,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264125838] [2020-11-06 22:30:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:26,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:26,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264125838] [2020-11-06 22:30:26,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:26,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:30:26,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371386435] [2020-11-06 22:30:26,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:30:26,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:26,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:30:26,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:30:26,860 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2020-11-06 22:30:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:26,995 INFO L93 Difference]: Finished difference Result 75 states and 118 transitions. [2020-11-06 22:30:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:30:26,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-06 22:30:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:27,006 INFO L225 Difference]: With dead ends: 75 [2020-11-06 22:30:27,006 INFO L226 Difference]: Without dead ends: 30 [2020-11-06 22:30:27,010 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 [2020-11-06 22:30:27,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-06 22:30:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-06 22:30:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-06 22:30:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-11-06 22:30:27,053 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2020-11-06 22:30:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:27,053 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-11-06 22:30:27,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:30:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-11-06 22:30:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:30:27,054 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:27,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:27,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:30:27,055 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:27,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:27,056 INFO L82 PathProgramCache]: Analyzing trace with hash -2142796056, now seen corresponding path program 1 times [2020-11-06 22:30:27,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:27,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164086640] [2020-11-06 22:30:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:27,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:27,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164086640] [2020-11-06 22:30:27,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:27,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:30:27,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141625622] [2020-11-06 22:30:27,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:30:27,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:27,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:30:27,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:30:27,284 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-11-06 22:30:27,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:27,483 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-11-06 22:30:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:30:27,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-06 22:30:27,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:27,486 INFO L225 Difference]: With dead ends: 47 [2020-11-06 22:30:27,486 INFO L226 Difference]: Without dead ends: 42 [2020-11-06 22:30:27,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:30:27,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-06 22:30:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-11-06 22:30:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-06 22:30:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-11-06 22:30:27,496 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 13 [2020-11-06 22:30:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:27,497 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-11-06 22:30:27,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:30:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-11-06 22:30:27,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:30:27,498 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:27,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:27,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:30:27,499 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:27,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:27,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1634639351, now seen corresponding path program 1 times [2020-11-06 22:30:27,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:27,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511374560] [2020-11-06 22:30:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:27,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:27,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511374560] [2020-11-06 22:30:27,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:27,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:30:27,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684129679] [2020-11-06 22:30:27,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:30:27,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:27,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:30:27,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:30:27,580 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 4 states. [2020-11-06 22:30:27,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:27,688 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2020-11-06 22:30:27,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:30:27,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-11-06 22:30:27,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:27,690 INFO L225 Difference]: With dead ends: 75 [2020-11-06 22:30:27,690 INFO L226 Difference]: Without dead ends: 52 [2020-11-06 22:30:27,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:30:27,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-06 22:30:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-11-06 22:30:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-06 22:30:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-11-06 22:30:27,701 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 16 [2020-11-06 22:30:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:27,701 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-11-06 22:30:27,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:30:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-11-06 22:30:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:30:27,702 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:27,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:27,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:30:27,703 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash -94271402, now seen corresponding path program 1 times [2020-11-06 22:30:27,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:27,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73618721] [2020-11-06 22:30:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:27,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:27,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73618721] [2020-11-06 22:30:27,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:27,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:30:27,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602623430] [2020-11-06 22:30:27,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:30:27,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:27,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:30:27,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:30:27,953 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 8 states. [2020-11-06 22:30:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:28,351 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-11-06 22:30:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:30:28,352 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-06 22:30:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:28,353 INFO L225 Difference]: With dead ends: 62 [2020-11-06 22:30:28,353 INFO L226 Difference]: Without dead ends: 51 [2020-11-06 22:30:28,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:30:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-06 22:30:28,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-11-06 22:30:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-06 22:30:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-11-06 22:30:28,363 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 19 [2020-11-06 22:30:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:28,363 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-11-06 22:30:28,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:30:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-11-06 22:30:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:30:28,365 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:28,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:28,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:30:28,365 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:28,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:28,366 INFO L82 PathProgramCache]: Analyzing trace with hash -96118444, now seen corresponding path program 1 times [2020-11-06 22:30:28,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:28,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642375430] [2020-11-06 22:30:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:30:28,392 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:30:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:30:28,414 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:30:28,444 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:30:28,445 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:30:28,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:30:28,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:30:28 BoogieIcfgContainer [2020-11-06 22:30:28,478 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:30:28,481 INFO L168 Benchmark]: Toolchain (without parser) took 3236.11 ms. Allocated memory is still 157.3 MB. Free memory was 133.0 MB in the beginning and 52.5 MB in the end (delta: 80.6 MB). Peak memory consumption was 81.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:30:28,482 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.4 MB in the end (delta: 68.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:30:28,483 INFO L168 Benchmark]: CACSL2BoogieTranslator took 482.52 ms. Allocated memory is still 157.3 MB. Free memory was 132.4 MB in the beginning and 110.5 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:30:28,484 INFO L168 Benchmark]: Boogie Preprocessor took 65.98 ms. Allocated memory is still 157.3 MB. Free memory was 110.5 MB in the beginning and 107.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:30:28,484 INFO L168 Benchmark]: RCFGBuilder took 640.19 ms. Allocated memory is still 157.3 MB. Free memory was 107.8 MB in the beginning and 99.6 MB in the end (delta: 8.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:30:28,485 INFO L168 Benchmark]: TraceAbstraction took 2036.48 ms. Allocated memory is still 157.3 MB. Free memory was 99.1 MB in the beginning and 52.5 MB in the end (delta: 46.6 MB). Peak memory consumption was 46.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:30:28,489 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.4 MB in the end (delta: 68.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 482.52 ms. Allocated memory is still 157.3 MB. Free memory was 132.4 MB in the beginning and 110.5 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.98 ms. Allocated memory is still 157.3 MB. Free memory was 110.5 MB in the beginning and 107.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 640.19 ms. Allocated memory is still 157.3 MB. Free memory was 107.8 MB in the beginning and 99.6 MB in the end (delta: 8.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2036.48 ms. Allocated memory is still 157.3 MB. Free memory was 99.1 MB in the beginning and 52.5 MB in the end (delta: 46.6 MB). Peak memory consumption was 46.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = head [L999] head->data = 0 [L1001] SLL* x = head; [L1002] int state = 1; VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}] [L1005] COND FALSE !(__VERIFIER_nondet_int()) [L1027] x->data = state [L1029] EXPR head->next [L1029] x = head->next [L1030] COND FALSE !(!(((void*)0) != x)) VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}] [L1032] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}, x->data=1] [L1032] COND TRUE x->data != 0 [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data [L1034] EXPR x->data [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}, x->data=1, x->next={-1:0}, x->next={-1:0}, x->next->data=1, x->next->data=1, x->next->data != 0 && x->data > x->next->data=0] [L1034] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1034] CALL reach_error() [L985] COND FALSE !(0) [L985] __assert_fail ("0", "dll-circular-1.c", 14, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 123 SDtfs, 68 SDslu, 137 SDs, 0 SdLazy, 237 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=4, 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, 4 MinimizatonAttempts, 24 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 6202 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...