/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-circular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:27:57,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:27:57,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:27:57,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:27:57,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:27:57,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:27:57,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:27:57,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:27:57,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:27:57,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:27:57,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:27:57,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:27:57,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:27:57,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:27:57,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:27:57,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:27:57,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:27:57,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:27:57,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:27:57,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:27:57,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:27:57,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:27:57,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:27:57,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:27:57,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:27:57,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:27:57,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:27:57,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:27:57,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:27:57,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:27:57,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:27:57,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:27:57,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:27:57,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:27:57,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:27:57,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:27:57,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:27:57,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:27:57,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:27:57,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:27:57,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:27:57,645 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 18:27:57,704 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:27:57,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:27:57,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:27:57,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:27:57,706 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:27:57,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:27:57,707 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:27:57,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:27:57,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:27:57,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:27:57,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:27:57,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:27:57,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:27:57,709 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:27:57,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:27:57,710 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:27:57,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:27:57,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:27:57,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:27:57,712 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:27:57,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:27:57,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:27:57,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:27:57,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:27:57,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:27:57,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:27:57,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:27:57,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:27:57,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:27:57,714 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:27:58,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:27:58,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:27:58,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:27:58,160 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:27:58,164 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:27:58,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-circular-1.i [2020-10-23 18:27:58,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/968762981/9f856bf6ffad4c58ad890d516a62b2e1/FLAG4a529dd65 [2020-10-23 18:27:59,033 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:27:59,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i [2020-10-23 18:27:59,051 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/968762981/9f856bf6ffad4c58ad890d516a62b2e1/FLAG4a529dd65 [2020-10-23 18:27:59,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/968762981/9f856bf6ffad4c58ad890d516a62b2e1 [2020-10-23 18:27:59,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:27:59,315 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:27:59,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:27:59,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:27:59,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:27:59,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:27:59" (1/1) ... [2020-10-23 18:27:59,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@728fefd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:59, skipping insertion in model container [2020-10-23 18:27:59,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:27:59" (1/1) ... [2020-10-23 18:27:59,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:27:59,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:27:59,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:27:59,794 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:27:59,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:27:59,907 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:27:59,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:59 WrapperNode [2020-10-23 18:27:59,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:27:59,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:27:59,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:27:59,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:27:59,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:59" (1/1) ... [2020-10-23 18:27:59,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:59" (1/1) ... [2020-10-23 18:27:59,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:59" (1/1) ... [2020-10-23 18:27:59,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:59" (1/1) ... [2020-10-23 18:27:59,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:59" (1/1) ... [2020-10-23 18:27:59,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:59" (1/1) ... [2020-10-23 18:27:59,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:59" (1/1) ... [2020-10-23 18:27:59,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:27:59,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:27:59,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:27:59,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:27:59,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:59" (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 18:28:00,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:28:00,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:28:00,080 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:28:00,081 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:28:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 18:28:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 18:28:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 18:28:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 18:28:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 18:28:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 18:28:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 18:28:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 18:28:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 18:28:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 18:28:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 18:28:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 18:28:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 18:28:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 18:28:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 18:28:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 18:28:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 18:28:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 18:28:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 18:28:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 18:28:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 18:28:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 18:28:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 18:28:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 18:28:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 18:28:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 18:28:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 18:28:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 18:28:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 18:28:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 18:28:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 18:28:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 18:28:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 18:28:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 18:28:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 18:28:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 18:28:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 18:28:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 18:28:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 18:28:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 18:28:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 18:28:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 18:28:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 18:28:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 18:28:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 18:28:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 18:28:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 18:28:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 18:28:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 18:28:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 18:28:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:28:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 18:28:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 18:28:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 18:28:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 18:28:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 18:28:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 18:28:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 18:28:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 18:28:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:28:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 18:28:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 18:28:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 18:28:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 18:28:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 18:28:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 18:28:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 18:28:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 18:28:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 18:28:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 18:28:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 18:28:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 18:28:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 18:28:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 18:28:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 18:28:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 18:28:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 18:28:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 18:28:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 18:28:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 18:28:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 18:28:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 18:28:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 18:28:00,094 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 18:28:00,094 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 18:28:00,094 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 18:28:00,094 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 18:28:00,094 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 18:28:00,094 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 18:28:00,094 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 18:28:00,095 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 18:28:00,095 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 18:28:00,095 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 18:28:00,095 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 18:28:00,095 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 18:28:00,095 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 18:28:00,095 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 18:28:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 18:28:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 18:28:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 18:28:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 18:28:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 18:28:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 18:28:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:28:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:28:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:28:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:28:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:28:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:28:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:28:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:28:00,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 18:28:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:28:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 18:28:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:28:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:28:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:28:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:28:00,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:28:00,679 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:28:00,680 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-23 18:28:00,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:28:00 BoogieIcfgContainer [2020-10-23 18:28:00,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:28:00,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:28:00,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:28:00,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:28:00,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:27:59" (1/3) ... [2020-10-23 18:28:00,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5620c06a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:28:00, skipping insertion in model container [2020-10-23 18:28:00,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:59" (2/3) ... [2020-10-23 18:28:00,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5620c06a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:28:00, skipping insertion in model container [2020-10-23 18:28:00,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:28:00" (3/3) ... [2020-10-23 18:28:00,691 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-circular-1.i [2020-10-23 18:28:00,705 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:28:00,711 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:28:00,725 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:28:00,767 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:28:00,767 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:28:00,767 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:28:00,768 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:28:00,768 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:28:00,768 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:28:00,768 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:28:00,768 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:28:00,788 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-23 18:28:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:28:00,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:00,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:00,796 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:00,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:00,804 INFO L82 PathProgramCache]: Analyzing trace with hash -323057978, now seen corresponding path program 1 times [2020-10-23 18:28:00,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:00,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808546929] [2020-10-23 18:28:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:01,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:01,079 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 18:28:01,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808546929] [2020-10-23 18:28:01,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:01,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:28:01,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629417688] [2020-10-23 18:28:01,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:28:01,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:01,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:28:01,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:28:01,112 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2020-10-23 18:28:01,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:01,295 INFO L93 Difference]: Finished difference Result 75 states and 118 transitions. [2020-10-23 18:28:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:28:01,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-23 18:28:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:01,322 INFO L225 Difference]: With dead ends: 75 [2020-10-23 18:28:01,322 INFO L226 Difference]: Without dead ends: 30 [2020-10-23 18:28:01,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:28:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-23 18:28:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-23 18:28:01,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 18:28:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-23 18:28:01,399 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2020-10-23 18:28:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:01,400 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-23 18:28:01,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:28:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-23 18:28:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:28:01,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:01,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:01,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:28:01,404 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:01,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2142796056, now seen corresponding path program 1 times [2020-10-23 18:28:01,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:01,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803293099] [2020-10-23 18:28:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:01,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:01,725 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 18:28:01,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803293099] [2020-10-23 18:28:01,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:01,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:28:01,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432093159] [2020-10-23 18:28:01,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:28:01,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:01,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:28:01,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:01,731 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-10-23 18:28:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:01,954 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-10-23 18:28:01,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:28:01,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-23 18:28:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:01,956 INFO L225 Difference]: With dead ends: 47 [2020-10-23 18:28:01,957 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 18:28:01,959 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 18:28:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 18:28:01,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-10-23 18:28:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 18:28:01,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-23 18:28:01,995 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 13 [2020-10-23 18:28:01,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:01,996 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-23 18:28:01,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:28:01,996 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-23 18:28:01,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:28:01,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:01,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:01,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:28:01,999 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1634639351, now seen corresponding path program 1 times [2020-10-23 18:28:02,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:02,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616939727] [2020-10-23 18:28:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:02,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:02,139 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 18:28:02,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616939727] [2020-10-23 18:28:02,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:02,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:28:02,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589875812] [2020-10-23 18:28:02,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:28:02,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:02,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:28:02,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:28:02,145 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 4 states. [2020-10-23 18:28:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:02,293 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2020-10-23 18:28:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:28:02,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-23 18:28:02,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:02,297 INFO L225 Difference]: With dead ends: 75 [2020-10-23 18:28:02,297 INFO L226 Difference]: Without dead ends: 52 [2020-10-23 18:28:02,298 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 18:28:02,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-23 18:28:02,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-23 18:28:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 18:28:02,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-23 18:28:02,307 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 16 [2020-10-23 18:28:02,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:02,308 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-23 18:28:02,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:28:02,308 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-23 18:28:02,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:28:02,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:02,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:02,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:28:02,310 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:02,310 INFO L82 PathProgramCache]: Analyzing trace with hash -94271402, now seen corresponding path program 1 times [2020-10-23 18:28:02,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:02,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375314726] [2020-10-23 18:28:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:02,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:02,556 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 18:28:02,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375314726] [2020-10-23 18:28:02,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:02,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 18:28:02,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285706608] [2020-10-23 18:28:02,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:28:02,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:02,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:28:02,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:28:02,559 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 8 states. [2020-10-23 18:28:02,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:02,969 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-10-23 18:28:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:28:02,970 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-23 18:28:02,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:02,971 INFO L225 Difference]: With dead ends: 62 [2020-10-23 18:28:02,971 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 18:28:02,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:28:02,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 18:28:02,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-10-23 18:28:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 18:28:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-10-23 18:28:02,981 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 19 [2020-10-23 18:28:02,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:02,981 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-10-23 18:28:02,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:28:02,982 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-10-23 18:28:02,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:28:02,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:02,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:02,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:28:02,983 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:02,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:02,984 INFO L82 PathProgramCache]: Analyzing trace with hash -96118444, now seen corresponding path program 1 times [2020-10-23 18:28:02,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:02,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163115924] [2020-10-23 18:28:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:28:03,010 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:28:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:28:03,029 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:28:03,060 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:28:03,060 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:28:03,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:28:03,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:28:03 BoogieIcfgContainer [2020-10-23 18:28:03,103 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:28:03,106 INFO L168 Benchmark]: Toolchain (without parser) took 3795.73 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 130.6 MB in the beginning and 133.3 MB in the end (delta: -2.6 MB). Peak memory consumption was 29.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:03,107 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.5 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:28:03,108 INFO L168 Benchmark]: CACSL2BoogieTranslator took 591.11 ms. Allocated memory is still 156.2 MB. Free memory was 130.1 MB in the beginning and 107.7 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:03,109 INFO L168 Benchmark]: Boogie Preprocessor took 86.29 ms. Allocated memory is still 156.2 MB. Free memory was 107.7 MB in the beginning and 138.2 MB in the end (delta: -30.6 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:03,110 INFO L168 Benchmark]: RCFGBuilder took 685.05 ms. Allocated memory is still 156.2 MB. Free memory was 138.2 MB in the beginning and 96.3 MB in the end (delta: 41.9 MB). Peak memory consumption was 41.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:03,111 INFO L168 Benchmark]: TraceAbstraction took 2419.96 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 95.7 MB in the beginning and 133.3 MB in the end (delta: -37.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:28:03,114 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.5 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 591.11 ms. Allocated memory is still 156.2 MB. Free memory was 130.1 MB in the beginning and 107.7 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 86.29 ms. Allocated memory is still 156.2 MB. Free memory was 107.7 MB in the beginning and 138.2 MB in the end (delta: -30.6 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 685.05 ms. Allocated memory is still 156.2 MB. Free memory was 138.2 MB in the beginning and 96.3 MB in the end (delta: 41.9 MB). Peak memory consumption was 41.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2419.96 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 95.7 MB in the beginning and 133.3 MB in the end (delta: -37.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = head [L999] head->data = 0 [L1001] SLL* x = head; [L1002] int state = 1; VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}] [L1005] COND FALSE !(__VERIFIER_nondet_int()) [L1027] x->data = state [L1029] EXPR head->next [L1029] x = head->next [L1030] COND FALSE !(!(((void*)0) != x)) VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}] [L1032] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}, x->data=1] [L1032] COND TRUE x->data != 0 [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data [L1034] EXPR x->data [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}, x->data=1, x->next={-1:0}, x->next={-1:0}, x->next->data=1, x->next->data=1, x->next->data != 0 && x->data > x->next->data=0] [L1034] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1034] CALL reach_error() [L985] COND FALSE !(0) [L985] __assert_fail ("0", "dll-circular-1.c", 14, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 123 SDtfs, 68 SDslu, 137 SDs, 0 SdLazy, 237 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 24 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 6202 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...