/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-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:27:56,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:27:56,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:27:56,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:27:56,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:27:56,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:27:56,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:27:56,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:27:56,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:27:56,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:27:56,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:27:56,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:27:56,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:27:56,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:27:56,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:27:56,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:27:56,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:27:56,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:27:56,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:27:56,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:27:56,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:27:56,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:27:56,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:27:56,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:27:56,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:27:56,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:27:56,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:27:56,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:27:56,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:27:56,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:27:56,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:27:56,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:27:56,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:27:56,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:27:56,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:27:56,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:27:56,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:27:56,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:27:56,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:27:56,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:27:56,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:27:56,208 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 [2020-10-23 18:27:56,271 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:27:56,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:27:56,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:27:56,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:27:56,276 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:27:56,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:27:56,276 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:27:56,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:27:56,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:27:56,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:27:56,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:27:56,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:27:56,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:27:56,279 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:27:56,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:27:56,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:27:56,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:27:56,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:27:56,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:27:56,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:27:56,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:27:56,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:27:56,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:27:56,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:27:56,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:27:56,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:27:56,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:27:56,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:27:56,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:27:56,282 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:27:56,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:27:56,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:27:56,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:27:56,750 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:27:56,750 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:27:56,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-10-23 18:27:56,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c1a6e586/8f008dc0c43a4f8194619343e43e4044/FLAGf340fe19a [2020-10-23 18:27:57,656 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:27:57,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-10-23 18:27:57,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c1a6e586/8f008dc0c43a4f8194619343e43e4044/FLAGf340fe19a [2020-10-23 18:27:57,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c1a6e586/8f008dc0c43a4f8194619343e43e4044 [2020-10-23 18:27:57,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:27:57,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:27:57,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:27:57,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:27:57,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:27:57,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:27:57" (1/1) ... [2020-10-23 18:27:57,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ddde572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:57, skipping insertion in model container [2020-10-23 18:27:57,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:27:57" (1/1) ... [2020-10-23 18:27:57,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:27:58,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:27:58,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:27:58,446 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:27:58,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:27:58,564 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:27:58,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:58 WrapperNode [2020-10-23 18:27:58,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:27:58,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:27:58,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:27:58,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:27:58,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:58" (1/1) ... [2020-10-23 18:27:58,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:58" (1/1) ... [2020-10-23 18:27:58,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:58" (1/1) ... [2020-10-23 18:27:58,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:58" (1/1) ... [2020-10-23 18:27:58,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:58" (1/1) ... [2020-10-23 18:27:58,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:58" (1/1) ... [2020-10-23 18:27:58,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:58" (1/1) ... [2020-10-23 18:27:58,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:27:58,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:27:58,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:27:58,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:27:58,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:27:58,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:27:58,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:27:58,764 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:27:58,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:27:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 18:27:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 18:27:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 18:27:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 18:27:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 18:27:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 18:27:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 18:27:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 18:27:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 18:27:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 18:27:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 18:27:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 18:27:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 18:27:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 18:27:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 18:27:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 18:27:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 18:27:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 18:27:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 18:27:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 18:27:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 18:27:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 18:27:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 18:27:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 18:27:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 18:27:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 18:27:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 18:27:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 18:27:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 18:27:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 18:27:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 18:27:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 18:27:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 18:27:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 18:27:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 18:27:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 18:27:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 18:27:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 18:27:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 18:27:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 18:27:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 18:27:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 18:27:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 18:27:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 18:27:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 18:27:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 18:27:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 18:27:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 18:27:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 18:27:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 18:27:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:27:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 18:27:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 18:27:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 18:27:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 18:27:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 18:27:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 18:27:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 18:27:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 18:27:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:27:58,776 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 18:27:58,776 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 18:27:58,776 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 18:27:58,776 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 18:27:58,776 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 18:27:58,776 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 18:27:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 18:27:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 18:27:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 18:27:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 18:27:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 18:27:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 18:27:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 18:27:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 18:27:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 18:27:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 18:27:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 18:27:58,779 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 18:27:58,779 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 18:27:58,779 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 18:27:58,779 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 18:27:58,779 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 18:27:58,779 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 18:27:58,780 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 18:27:58,780 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 18:27:58,780 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 18:27:58,780 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 18:27:58,780 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 18:27:58,780 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 18:27:58,781 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 18:27:58,781 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 18:27:58,781 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 18:27:58,781 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 18:27:58,781 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 18:27:58,781 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 18:27:58,782 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 18:27:58,782 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 18:27:58,782 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 18:27:58,782 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 18:27:58,782 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 18:27:58,782 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 18:27:58,783 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 18:27:58,783 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 18:27:58,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:27:58,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:27:58,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:27:58,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:27:58,784 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:27:58,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:27:58,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:27:58,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:27:58,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 18:27:58,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 18:27:58,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:27:58,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:27:58,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:27:58,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:27:58,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:27:58,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:27:59,462 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:27:59,462 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-10-23 18:27:59,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:27:59 BoogieIcfgContainer [2020-10-23 18:27:59,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:27:59,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:27:59,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:27:59,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:27:59,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:27:57" (1/3) ... [2020-10-23 18:27:59,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d1130e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:27:59, skipping insertion in model container [2020-10-23 18:27:59,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:58" (2/3) ... [2020-10-23 18:27:59,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d1130e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:27:59, skipping insertion in model container [2020-10-23 18:27:59,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:27:59" (3/3) ... [2020-10-23 18:27:59,474 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-10-23 18:27:59,488 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:27:59,495 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:27:59,512 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:27:59,562 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:27:59,562 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:27:59,562 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:27:59,563 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:27:59,568 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:27:59,569 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:27:59,569 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:27:59,569 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:27:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states. [2020-10-23 18:27:59,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-23 18:27:59,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:27:59,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:27:59,608 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:27:59,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:27:59,618 INFO L82 PathProgramCache]: Analyzing trace with hash 987864192, now seen corresponding path program 1 times [2020-10-23 18:27:59,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:27:59,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029756838] [2020-10-23 18:27:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:27:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:27:59,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:27:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:27:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:27:59,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029756838] [2020-10-23 18:27:59,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:27:59,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:27:59,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556390015] [2020-10-23 18:27:59,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:27:59,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:27:59,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:27:59,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:27:59,930 INFO L87 Difference]: Start difference. First operand 93 states. Second operand 4 states. [2020-10-23 18:28:00,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:00,330 INFO L93 Difference]: Finished difference Result 179 states and 324 transitions. [2020-10-23 18:28:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:28:00,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-23 18:28:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:00,353 INFO L225 Difference]: With dead ends: 179 [2020-10-23 18:28:00,354 INFO L226 Difference]: Without dead ends: 87 [2020-10-23 18:28:00,361 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 [2020-10-23 18:28:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-23 18:28:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2020-10-23 18:28:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-23 18:28:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-10-23 18:28:00,411 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 10 [2020-10-23 18:28:00,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:00,412 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-10-23 18:28:00,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:28:00,412 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-10-23 18:28:00,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:28:00,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:00,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:00,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:28:00,414 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:00,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:00,415 INFO L82 PathProgramCache]: Analyzing trace with hash 496275789, now seen corresponding path program 1 times [2020-10-23 18:28:00,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:00,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692923954] [2020-10-23 18:28:00,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:00,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:00,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692923954] [2020-10-23 18:28:00,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:00,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:28:00,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786906463] [2020-10-23 18:28:00,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:28:00,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:00,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:28:00,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:28:00,513 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 4 states. [2020-10-23 18:28:00,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:00,709 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-10-23 18:28:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:28:00,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-23 18:28:00,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:00,712 INFO L225 Difference]: With dead ends: 77 [2020-10-23 18:28:00,712 INFO L226 Difference]: Without dead ends: 73 [2020-10-23 18:28:00,713 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 [2020-10-23 18:28:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-23 18:28:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-23 18:28:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-23 18:28:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-23 18:28:00,726 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 16 [2020-10-23 18:28:00,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:00,726 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-23 18:28:00,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:28:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-23 18:28:00,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:28:00,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:00,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:00,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:28:00,728 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:00,729 INFO L82 PathProgramCache]: Analyzing trace with hash 498122831, now seen corresponding path program 1 times [2020-10-23 18:28:00,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:00,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352542155] [2020-10-23 18:28:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:00,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:00,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352542155] [2020-10-23 18:28:00,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:00,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:28:00,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616974749] [2020-10-23 18:28:00,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:28:00,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:00,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:28:00,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:00,866 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 5 states. [2020-10-23 18:28:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:01,074 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-10-23 18:28:01,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:28:01,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-23 18:28:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:01,076 INFO L225 Difference]: With dead ends: 77 [2020-10-23 18:28:01,077 INFO L226 Difference]: Without dead ends: 73 [2020-10-23 18:28:01,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:01,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-23 18:28:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-23 18:28:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 18:28:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2020-10-23 18:28:01,087 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 16 [2020-10-23 18:28:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:01,088 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2020-10-23 18:28:01,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:28:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2020-10-23 18:28:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:28:01,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:01,089 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] [2020-10-23 18:28:01,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:28:01,089 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash 265378658, now seen corresponding path program 1 times [2020-10-23 18:28:01,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:01,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110149483] [2020-10-23 18:28:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:01,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:01,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110149483] [2020-10-23 18:28:01,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:01,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:28:01,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844582399] [2020-10-23 18:28:01,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:28:01,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:01,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:28:01,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:01,216 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 5 states. [2020-10-23 18:28:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:01,521 INFO L93 Difference]: Finished difference Result 175 states and 225 transitions. [2020-10-23 18:28:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:28:01,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-23 18:28:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:01,524 INFO L225 Difference]: With dead ends: 175 [2020-10-23 18:28:01,524 INFO L226 Difference]: Without dead ends: 116 [2020-10-23 18:28:01,525 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 [2020-10-23 18:28:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-23 18:28:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 73. [2020-10-23 18:28:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-23 18:28:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2020-10-23 18:28:01,536 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 21 [2020-10-23 18:28:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:01,536 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2020-10-23 18:28:01,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:28:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2020-10-23 18:28:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:28:01,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:01,537 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] [2020-10-23 18:28:01,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:28:01,538 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:01,538 INFO L82 PathProgramCache]: Analyzing trace with hash -127648352, now seen corresponding path program 1 times [2020-10-23 18:28:01,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:01,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175189543] [2020-10-23 18:28:01,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:01,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:01,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175189543] [2020-10-23 18:28:01,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:01,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:28:01,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240755465] [2020-10-23 18:28:01,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:28:01,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:01,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:28:01,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:28:01,650 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 6 states. [2020-10-23 18:28:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:02,006 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2020-10-23 18:28:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:28:02,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-23 18:28:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:02,008 INFO L225 Difference]: With dead ends: 114 [2020-10-23 18:28:02,008 INFO L226 Difference]: Without dead ends: 109 [2020-10-23 18:28:02,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:28:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-23 18:28:02,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-23 18:28:02,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 18:28:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2020-10-23 18:28:02,019 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 21 [2020-10-23 18:28:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:02,019 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2020-10-23 18:28:02,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:28:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2020-10-23 18:28:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:28:02,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:02,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:02,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:28:02,021 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:02,022 INFO L82 PathProgramCache]: Analyzing trace with hash 334207909, now seen corresponding path program 1 times [2020-10-23 18:28:02,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:02,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250117294] [2020-10-23 18:28:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:02,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:02,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250117294] [2020-10-23 18:28:02,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:02,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:28:02,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666736587] [2020-10-23 18:28:02,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:28:02,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:02,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:28:02,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:02,139 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 5 states. [2020-10-23 18:28:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:02,384 INFO L93 Difference]: Finished difference Result 123 states and 154 transitions. [2020-10-23 18:28:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:28:02,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-23 18:28:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:02,385 INFO L225 Difference]: With dead ends: 123 [2020-10-23 18:28:02,386 INFO L226 Difference]: Without dead ends: 104 [2020-10-23 18:28:02,386 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 [2020-10-23 18:28:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-23 18:28:02,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2020-10-23 18:28:02,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 18:28:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-10-23 18:28:02,395 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 22 [2020-10-23 18:28:02,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:02,395 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-10-23 18:28:02,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:28:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-10-23 18:28:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:28:02,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:02,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:02,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:28:02,397 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:02,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:02,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1622058487, now seen corresponding path program 1 times [2020-10-23 18:28:02,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:02,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494288901] [2020-10-23 18:28:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:02,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:02,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494288901] [2020-10-23 18:28:02,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:02,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:28:02,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756246571] [2020-10-23 18:28:02,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:28:02,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:02,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:28:02,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:28:02,460 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 4 states. [2020-10-23 18:28:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:02,618 INFO L93 Difference]: Finished difference Result 129 states and 163 transitions. [2020-10-23 18:28:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:28:02,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-23 18:28:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:02,620 INFO L225 Difference]: With dead ends: 129 [2020-10-23 18:28:02,620 INFO L226 Difference]: Without dead ends: 92 [2020-10-23 18:28:02,621 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 [2020-10-23 18:28:02,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-23 18:28:02,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2020-10-23 18:28:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-23 18:28:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-10-23 18:28:02,628 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 26 [2020-10-23 18:28:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:02,628 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-10-23 18:28:02,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:28:02,629 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-10-23 18:28:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:28:02,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:02,630 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] [2020-10-23 18:28:02,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:28:02,630 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:02,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:02,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1263296047, now seen corresponding path program 1 times [2020-10-23 18:28:02,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:02,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734210474] [2020-10-23 18:28:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:02,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:02,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734210474] [2020-10-23 18:28:02,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:02,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:28:02,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692273937] [2020-10-23 18:28:02,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:28:02,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:02,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:28:02,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:28:02,689 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 4 states. [2020-10-23 18:28:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:02,844 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2020-10-23 18:28:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:28:02,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:28:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:02,845 INFO L225 Difference]: With dead ends: 77 [2020-10-23 18:28:02,845 INFO L226 Difference]: Without dead ends: 73 [2020-10-23 18:28:02,846 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 [2020-10-23 18:28:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-23 18:28:02,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-23 18:28:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-23 18:28:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-23 18:28:02,852 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 27 [2020-10-23 18:28:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:02,853 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-23 18:28:02,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:28:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-23 18:28:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:28:02,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:02,855 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] [2020-10-23 18:28:02,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:28:02,855 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:02,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1688120956, now seen corresponding path program 1 times [2020-10-23 18:28:02,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:02,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163434256] [2020-10-23 18:28:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:02,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:02,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163434256] [2020-10-23 18:28:02,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:02,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:28:02,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634792280] [2020-10-23 18:28:02,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:28:02,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:02,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:28:02,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:28:02,920 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 4 states. [2020-10-23 18:28:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:03,062 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-10-23 18:28:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:28:03,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-23 18:28:03,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:03,063 INFO L225 Difference]: With dead ends: 78 [2020-10-23 18:28:03,064 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:28:03,064 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 [2020-10-23 18:28:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:28:03,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-23 18:28:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-23 18:28:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2020-10-23 18:28:03,070 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 29 [2020-10-23 18:28:03,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:03,071 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2020-10-23 18:28:03,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:28:03,071 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2020-10-23 18:28:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:28:03,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:03,072 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] [2020-10-23 18:28:03,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 18:28:03,072 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:03,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:03,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1686273914, now seen corresponding path program 1 times [2020-10-23 18:28:03,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:03,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146847689] [2020-10-23 18:28:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:03,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:03,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146847689] [2020-10-23 18:28:03,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:03,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:28:03,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333532318] [2020-10-23 18:28:03,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:28:03,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:03,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:28:03,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:03,149 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand 5 states. [2020-10-23 18:28:03,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:03,338 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2020-10-23 18:28:03,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:28:03,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-23 18:28:03,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:03,339 INFO L225 Difference]: With dead ends: 78 [2020-10-23 18:28:03,339 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:28:03,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:03,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:28:03,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-23 18:28:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-23 18:28:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2020-10-23 18:28:03,345 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 29 [2020-10-23 18:28:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:03,346 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2020-10-23 18:28:03,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:28:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2020-10-23 18:28:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:28:03,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:03,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:03,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 18:28:03,351 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:03,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1218900559, now seen corresponding path program 1 times [2020-10-23 18:28:03,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:03,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538856447] [2020-10-23 18:28:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:03,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:03,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538856447] [2020-10-23 18:28:03,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:03,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:28:03,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180345337] [2020-10-23 18:28:03,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:28:03,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:03,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:28:03,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:28:03,511 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand 7 states. [2020-10-23 18:28:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:03,907 INFO L93 Difference]: Finished difference Result 167 states and 207 transitions. [2020-10-23 18:28:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:28:03,908 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-23 18:28:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:03,910 INFO L225 Difference]: With dead ends: 167 [2020-10-23 18:28:03,910 INFO L226 Difference]: Without dead ends: 128 [2020-10-23 18:28:03,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:28:03,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-23 18:28:03,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 82. [2020-10-23 18:28:03,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-23 18:28:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2020-10-23 18:28:03,918 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 30 [2020-10-23 18:28:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:03,918 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2020-10-23 18:28:03,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:28:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2020-10-23 18:28:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:28:03,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:03,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:03,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 18:28:03,920 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:03,921 INFO L82 PathProgramCache]: Analyzing trace with hash -964421169, now seen corresponding path program 1 times [2020-10-23 18:28:03,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:03,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251492382] [2020-10-23 18:28:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:04,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:04,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251492382] [2020-10-23 18:28:04,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:04,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 18:28:04,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165959550] [2020-10-23 18:28:04,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:28:04,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:04,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:28:04,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:28:04,218 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand 8 states. [2020-10-23 18:28:05,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:05,182 INFO L93 Difference]: Finished difference Result 224 states and 274 transitions. [2020-10-23 18:28:05,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:28:05,184 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-23 18:28:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:05,187 INFO L225 Difference]: With dead ends: 224 [2020-10-23 18:28:05,187 INFO L226 Difference]: Without dead ends: 220 [2020-10-23 18:28:05,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:28:05,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-23 18:28:05,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 94. [2020-10-23 18:28:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-23 18:28:05,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2020-10-23 18:28:05,199 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 30 [2020-10-23 18:28:05,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:05,199 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2020-10-23 18:28:05,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:28:05,200 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2020-10-23 18:28:05,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:28:05,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:05,201 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] [2020-10-23 18:28:05,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 18:28:05,201 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:05,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1480227389, now seen corresponding path program 1 times [2020-10-23 18:28:05,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:05,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819093699] [2020-10-23 18:28:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:05,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:28:05,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819093699] [2020-10-23 18:28:05,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:05,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:28:05,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765835477] [2020-10-23 18:28:05,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:28:05,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:05,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:28:05,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:28:05,334 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 6 states. [2020-10-23 18:28:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:05,688 INFO L93 Difference]: Finished difference Result 137 states and 166 transitions. [2020-10-23 18:28:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:28:05,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-23 18:28:05,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:05,693 INFO L225 Difference]: With dead ends: 137 [2020-10-23 18:28:05,693 INFO L226 Difference]: Without dead ends: 119 [2020-10-23 18:28:05,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:28:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-23 18:28:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2020-10-23 18:28:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-23 18:28:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 139 transitions. [2020-10-23 18:28:05,708 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 139 transitions. Word has length 32 [2020-10-23 18:28:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:05,708 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 139 transitions. [2020-10-23 18:28:05,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:28:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 139 transitions. [2020-10-23 18:28:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:28:05,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:05,712 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] [2020-10-23 18:28:05,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 18:28:05,713 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:05,713 INFO L82 PathProgramCache]: Analyzing trace with hash 586599747, now seen corresponding path program 1 times [2020-10-23 18:28:05,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:05,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438307714] [2020-10-23 18:28:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:05,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:28:05,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438307714] [2020-10-23 18:28:05,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:05,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:28:05,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473461655] [2020-10-23 18:28:05,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:28:05,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:05,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:28:05,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:28:05,777 INFO L87 Difference]: Start difference. First operand 114 states and 139 transitions. Second operand 4 states. [2020-10-23 18:28:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:05,987 INFO L93 Difference]: Finished difference Result 117 states and 141 transitions. [2020-10-23 18:28:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:28:05,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-23 18:28:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:05,988 INFO L225 Difference]: With dead ends: 117 [2020-10-23 18:28:05,988 INFO L226 Difference]: Without dead ends: 113 [2020-10-23 18:28:05,989 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 [2020-10-23 18:28:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-23 18:28:06,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-23 18:28:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-23 18:28:06,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2020-10-23 18:28:06,001 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 32 [2020-10-23 18:28:06,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:06,001 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2020-10-23 18:28:06,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:28:06,002 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2020-10-23 18:28:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:28:06,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:06,002 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] [2020-10-23 18:28:06,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 18:28:06,003 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:06,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:06,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2008414403, now seen corresponding path program 1 times [2020-10-23 18:28:06,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:06,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059098529] [2020-10-23 18:28:06,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:28:06,027 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:28:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:28:06,060 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:28:06,107 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:28:06,107 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:28:06,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 18:28:06,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:28:06 BoogieIcfgContainer [2020-10-23 18:28:06,186 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:28:06,188 INFO L168 Benchmark]: Toolchain (without parser) took 8260.93 ms. Allocated memory was 167.8 MB in the beginning and 201.3 MB in the end (delta: 33.6 MB). Free memory was 142.1 MB in the beginning and 158.9 MB in the end (delta: -16.8 MB). Peak memory consumption was 17.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:06,189 INFO L168 Benchmark]: CDTParser took 0.19 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: 73.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:28:06,190 INFO L168 Benchmark]: CACSL2BoogieTranslator took 630.31 ms. Allocated memory is still 167.8 MB. Free memory was 141.5 MB in the beginning and 118.8 MB in the end (delta: 22.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:06,193 INFO L168 Benchmark]: Boogie Preprocessor took 123.54 ms. Allocated memory is still 167.8 MB. Free memory was 118.8 MB in the beginning and 149.7 MB in the end (delta: -30.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:06,200 INFO L168 Benchmark]: RCFGBuilder took 774.14 ms. Allocated memory is still 167.8 MB. Free memory was 149.7 MB in the beginning and 140.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 49.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:06,201 INFO L168 Benchmark]: TraceAbstraction took 6720.03 ms. Allocated memory was 167.8 MB in the beginning and 201.3 MB in the end (delta: 33.6 MB). Free memory was 139.5 MB in the beginning and 158.9 MB in the end (delta: -19.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:06,206 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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: 73.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 630.31 ms. Allocated memory is still 167.8 MB. Free memory was 141.5 MB in the beginning and 118.8 MB in the end (delta: 22.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 123.54 ms. Allocated memory is still 167.8 MB. Free memory was 118.8 MB in the beginning and 149.7 MB in the end (delta: -30.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 774.14 ms. Allocated memory is still 167.8 MB. Free memory was 149.7 MB in the beginning and 140.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 49.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6720.03 ms. Allocated memory was 167.8 MB in the beginning and 201.3 MB in the end (delta: 33.6 MB). Free memory was 139.5 MB in the beginning and 158.9 MB in the end (delta: -19.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 992]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1003] SLL* list = malloc(sizeof(SLL)); [L1004] list->next = ((void*)0) [L1005] list->prev = ((void*)0) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1006] COND FALSE !(!(list != ((void*)0))) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1006] COND FALSE !(__VERIFIER_nondet_int()) [L1006] list->inner = malloc(sizeof(SLL)) [L1006] EXPR list->inner [L1006] list->inner->next = ((void*)0) [L1006] EXPR list->inner [L1006] list->inner->inner = ((void*)0) [L1006] EXPR list->inner [L1006] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) VAL [list={-1:0}, list->inner={-2:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1006] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L1008] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1022] end = ((void*)0) [L1023] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1026] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1028] COND TRUE ((void*)0) != end [L1030] int len = 0; [L1031] EXPR end->inner [L1031] SLL* inner = end->inner; [L1032] COND TRUE ((void*)0) != inner VAL [end={-1:0}, inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1034] COND TRUE len == 0 [L1035] len = 1 VAL [end={-1:0}, inner={-2:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1038] COND FALSE !(!(((void*)0) != inner)) VAL [end={-1:0}, inner={-2:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1039] EXPR inner->inner VAL [end={-1:0}, inner={-2:0}, inner->inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1039] COND FALSE !(!(((void*)0) == inner->inner)) [L1040] EXPR inner->next VAL [end={-1:0}, inner={-2:0}, inner->next={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1040] COND TRUE !(((void*)0) != inner->next) [L1040] CALL reach_error() [L992] COND FALSE !(0) [L992] __assert_fail ("0", "dll-01-1.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 93 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.5s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1091 SDtfs, 856 SDslu, 1530 SDs, 0 SdLazy, 1941 SolverSat, 236 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 328 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 374 NumberOfCodeBlocks, 374 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 327 ConstructedInterpolants, 0 QuantifiedInterpolants, 51708 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 2/2 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...