/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-token-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:28:15,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:28:15,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:28:15,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:28:15,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:28:15,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:28:15,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:28:15,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:28:15,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:28:15,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:28:15,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:28:15,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:28:15,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:28:15,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:28:15,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:28:15,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:28:15,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:28:15,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:28:15,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:28:15,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:28:15,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:28:15,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:28:15,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:28:15,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:28:15,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:28:15,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:28:15,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:28:15,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:28:15,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:28:15,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:28:15,772 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:28:15,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:28:15,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:28:15,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:28:15,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:28:15,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:28:15,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:28:15,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:28:15,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:28:15,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:28:15,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:28:15,782 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 18:28:15,839 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:28:15,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:28:15,843 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:28:15,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:28:15,844 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:28:15,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:28:15,844 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:28:15,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:28:15,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:28:15,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:28:15,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:28:15,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:28:15,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:28:15,847 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:28:15,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:28:15,848 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:28:15,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:28:15,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:28:15,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:28:15,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:28:15,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:28:15,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:28:15,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:28:15,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:28:15,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:28:15,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:28:15,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:28:15,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:28:15,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:28:15,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:28:16,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:28:16,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:28:16,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:28:16,364 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:28:16,365 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:28:16,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-token-2.i [2020-10-23 18:28:16,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b37dd80c7/a7eb950e45d344f39c1527cee2cb3b3a/FLAG65192d993 [2020-10-23 18:28:17,277 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:28:17,278 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-token-2.i [2020-10-23 18:28:17,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b37dd80c7/a7eb950e45d344f39c1527cee2cb3b3a/FLAG65192d993 [2020-10-23 18:28:17,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b37dd80c7/a7eb950e45d344f39c1527cee2cb3b3a [2020-10-23 18:28:17,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:28:17,565 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:28:17,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:28:17,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:28:17,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:28:17,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:28:17" (1/1) ... [2020-10-23 18:28:17,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67d60f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:17, skipping insertion in model container [2020-10-23 18:28:17,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:28:17" (1/1) ... [2020-10-23 18:28:17,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:28:17,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:28:18,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:28:18,019 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:28:18,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:28:18,141 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:28:18,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:18 WrapperNode [2020-10-23 18:28:18,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:28:18,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:28:18,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:28:18,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:28:18,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:18" (1/1) ... [2020-10-23 18:28:18,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:18" (1/1) ... [2020-10-23 18:28:18,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:18" (1/1) ... [2020-10-23 18:28:18,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:18" (1/1) ... [2020-10-23 18:28:18,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:18" (1/1) ... [2020-10-23 18:28:18,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:18" (1/1) ... [2020-10-23 18:28:18,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:18" (1/1) ... [2020-10-23 18:28:18,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:28:18,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:28:18,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:28:18,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:28:18,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:18" (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 18:28:18,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:28:18,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:28:18,312 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:28:18,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:28:18,312 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 18:28:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 18:28:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 18:28:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 18:28:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 18:28:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 18:28:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 18:28:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 18:28:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 18:28:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 18:28:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 18:28:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 18:28:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 18:28:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 18:28:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 18:28:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 18:28:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 18:28:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 18:28:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 18:28:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 18:28:18,320 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 18:28:18,320 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 18:28:18,320 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 18:28:18,320 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 18:28:18,320 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 18:28:18,320 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 18:28:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 18:28:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 18:28:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 18:28:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 18:28:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 18:28:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 18:28:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 18:28:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 18:28:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 18:28:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 18:28:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 18:28:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 18:28:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 18:28:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 18:28:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 18:28:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 18:28:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 18:28:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 18:28:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 18:28:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 18:28:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 18:28:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 18:28:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 18:28:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 18:28:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:28:18,324 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 18:28:18,325 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 18:28:18,325 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 18:28:18,325 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 18:28:18,325 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 18:28:18,325 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 18:28:18,325 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 18:28:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 18:28:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:28:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 18:28:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 18:28:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 18:28:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 18:28:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 18:28:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 18:28:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 18:28:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 18:28:18,328 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 18:28:18,328 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 18:28:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 18:28:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 18:28:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 18:28:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 18:28:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 18:28:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 18:28:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 18:28:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 18:28:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 18:28:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 18:28:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 18:28:18,332 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 18:28:18,332 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 18:28:18,333 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 18:28:18,333 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 18:28:18,333 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 18:28:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 18:28:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 18:28:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 18:28:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 18:28:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 18:28:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 18:28:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 18:28:18,335 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 18:28:18,335 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 18:28:18,335 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 18:28:18,335 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 18:28:18,335 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 18:28:18,335 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 18:28:18,335 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 18:28:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 18:28:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 18:28:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 18:28:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:28:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:28:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:28:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:28:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:28:18,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:28:18,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:28:18,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:28:18,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 18:28:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:28:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 18:28:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:28:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:28:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:28:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:28:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:28:18,961 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:28:18,962 INFO L298 CfgBuilder]: Removed 15 assume(true) statements. [2020-10-23 18:28:18,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:28:18 BoogieIcfgContainer [2020-10-23 18:28:18,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:28:18,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:28:18,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:28:18,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:28:18,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:28:17" (1/3) ... [2020-10-23 18:28:18,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a42b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:28:18, skipping insertion in model container [2020-10-23 18:28:18,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:18" (2/3) ... [2020-10-23 18:28:18,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a42b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:28:18, skipping insertion in model container [2020-10-23 18:28:18,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:28:18" (3/3) ... [2020-10-23 18:28:18,974 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-token-2.i [2020-10-23 18:28:18,986 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:28:18,992 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:28:19,006 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:28:19,035 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:28:19,035 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:28:19,036 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:28:19,036 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:28:19,036 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:28:19,036 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:28:19,036 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:28:19,036 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:28:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-23 18:28:19,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:28:19,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:19,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:19,063 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:19,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:19,070 INFO L82 PathProgramCache]: Analyzing trace with hash 856451337, now seen corresponding path program 1 times [2020-10-23 18:28:19,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:19,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643453994] [2020-10-23 18:28:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:19,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:19,446 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 18:28:19,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643453994] [2020-10-23 18:28:19,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:19,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:28:19,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966794655] [2020-10-23 18:28:19,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:28:19,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:19,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:28:19,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:19,473 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 5 states. [2020-10-23 18:28:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:19,713 INFO L93 Difference]: Finished difference Result 93 states and 151 transitions. [2020-10-23 18:28:19,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:28:19,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-23 18:28:19,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:19,728 INFO L225 Difference]: With dead ends: 93 [2020-10-23 18:28:19,728 INFO L226 Difference]: Without dead ends: 39 [2020-10-23 18:28:19,732 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 18:28:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-23 18:28:19,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-23 18:28:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 18:28:19,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-23 18:28:19,794 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 12 [2020-10-23 18:28:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:19,794 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-23 18:28:19,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:28:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-23 18:28:19,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:28:19,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:19,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:19,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:28:19,796 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash 734291246, now seen corresponding path program 1 times [2020-10-23 18:28:19,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:19,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280074642] [2020-10-23 18:28:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:19,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:19,906 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 18:28:19,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280074642] [2020-10-23 18:28:19,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:19,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:28:19,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392628687] [2020-10-23 18:28:19,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:28:19,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:19,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:28:19,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:19,910 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 5 states. [2020-10-23 18:28:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:20,104 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-23 18:28:20,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:28:20,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-23 18:28:20,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:20,106 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:28:20,107 INFO L226 Difference]: Without dead ends: 60 [2020-10-23 18:28:20,108 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 18:28:20,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-23 18:28:20,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2020-10-23 18:28:20,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:28:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-23 18:28:20,118 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 13 [2020-10-23 18:28:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:20,118 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-23 18:28:20,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:28:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-23 18:28:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:28:20,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:20,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:20,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:28:20,120 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:20,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1364408435, now seen corresponding path program 1 times [2020-10-23 18:28:20,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:20,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348853125] [2020-10-23 18:28:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:20,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:20,255 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 18:28:20,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348853125] [2020-10-23 18:28:20,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:20,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:28:20,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452328941] [2020-10-23 18:28:20,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:28:20,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:28:20,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:28:20,261 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-10-23 18:28:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:20,471 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-23 18:28:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:28:20,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-23 18:28:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:20,473 INFO L225 Difference]: With dead ends: 41 [2020-10-23 18:28:20,473 INFO L226 Difference]: Without dead ends: 37 [2020-10-23 18:28:20,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:28:20,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-23 18:28:20,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-23 18:28:20,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-23 18:28:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-23 18:28:20,486 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 18 [2020-10-23 18:28:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:20,486 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-23 18:28:20,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:28:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-23 18:28:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:28:20,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:20,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:20,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:28:20,488 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:20,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1400691951, now seen corresponding path program 1 times [2020-10-23 18:28:20,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:20,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862978894] [2020-10-23 18:28:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:20,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:20,645 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 18:28:20,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862978894] [2020-10-23 18:28:20,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:20,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:28:20,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344801259] [2020-10-23 18:28:20,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:28:20,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:20,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:28:20,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:28:20,648 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 6 states. [2020-10-23 18:28:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:20,929 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-23 18:28:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:28:20,930 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-23 18:28:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:20,931 INFO L225 Difference]: With dead ends: 72 [2020-10-23 18:28:20,931 INFO L226 Difference]: Without dead ends: 48 [2020-10-23 18:28:20,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:28:20,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-23 18:28:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-10-23 18:28:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:28:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-23 18:28:20,941 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 18 [2020-10-23 18:28:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:20,942 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-23 18:28:20,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:28:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-23 18:28:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:28:20,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:20,943 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 18:28:20,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:28:20,944 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:20,944 INFO L82 PathProgramCache]: Analyzing trace with hash -599195063, now seen corresponding path program 1 times [2020-10-23 18:28:20,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:20,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4633927] [2020-10-23 18:28:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:28:20,974 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:28:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:28:21,003 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:28:21,036 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:28:21,036 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:28:21,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:28:21,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:28:21 BoogieIcfgContainer [2020-10-23 18:28:21,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:28:21,079 INFO L168 Benchmark]: Toolchain (without parser) took 3518.82 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 125.1 MB in the beginning and 140.0 MB in the end (delta: -14.9 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:21,080 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.7 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:28:21,081 INFO L168 Benchmark]: CACSL2BoogieTranslator took 574.54 ms. Allocated memory is still 151.0 MB. Free memory was 124.4 MB in the beginning and 102.4 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:21,081 INFO L168 Benchmark]: Boogie Preprocessor took 88.15 ms. Allocated memory is still 151.0 MB. Free memory was 102.4 MB in the beginning and 132.9 MB in the end (delta: -30.5 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:21,082 INFO L168 Benchmark]: RCFGBuilder took 729.28 ms. Allocated memory is still 151.0 MB. Free memory was 132.9 MB in the beginning and 88.4 MB in the end (delta: 44.6 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:21,083 INFO L168 Benchmark]: TraceAbstraction took 2110.19 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 87.8 MB in the beginning and 140.0 MB in the end (delta: -52.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:28:21,087 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 151.0 MB. Free memory was 124.8 MB in the beginning and 124.7 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 574.54 ms. Allocated memory is still 151.0 MB. Free memory was 124.4 MB in the beginning and 102.4 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 88.15 ms. Allocated memory is still 151.0 MB. Free memory was 102.4 MB in the beginning and 132.9 MB in the end (delta: -30.5 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 729.28 ms. Allocated memory is still 151.0 MB. Free memory was 132.9 MB in the beginning and 88.4 MB in the end (delta: 44.6 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2110.19 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 87.8 MB in the beginning and 140.0 MB in the end (delta: -52.1 MB). There was no memory consumed. 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: [L1004] SLL* head = malloc(sizeof(SLL)); [L1005] head->next = ((void*)0) [L1006] head->prev = ((void*)0) [L1007] head->data = 0 [L1009] SLL* x = head; VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}] [L1012] COND FALSE !(__VERIFIER_nondet_int()) [L1021] x->data = 1 [L1022] x->next = malloc(sizeof(SLL)) [L1023] EXPR x->next [L1023] x->next->prev = x [L1024] EXPR x->next [L1024] x->next->data = 2 [L1026] x = head VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-1:0}] [L1028] COND FALSE !(!(((void*)0) != x)) VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-1:0}] [L1030] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-1:0}, x->data=1] [L1030] COND FALSE !(1 != x->data) [L1035] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-1:0}, x->data=1] [L1035] COND FALSE !(!(1 == x->data)) [L1036] EXPR x->next [L1036] x = x->next [L1037] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}, x->data=2] [L1037] COND TRUE !(2 != x->data) [L1037] CALL reach_error() [L992] COND FALSE !(0) [L992] __assert_fail ("0", "dll-token-2.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 89 SDslu, 245 SDs, 0 SdLazy, 314 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 26 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 4142 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...