/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:48:27,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:48:27,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:48:27,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:48:27,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:48:27,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:48:27,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:48:27,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:48:27,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:48:27,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:48:27,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:48:27,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:48:27,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:48:27,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:48:27,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:48:27,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:48:27,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:48:27,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:48:27,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:48:27,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:48:27,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:48:27,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:48:27,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:48:27,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:48:27,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 16:48:27,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 16:48:27,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 16:48:27,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 16:48:27,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 16:48:27,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 16:48:27,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 16:48:27,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 16:48:27,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 16:48:27,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 16:48:27,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 16:48:27,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 16:48:27,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 16:48:27,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 16:48:27,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:48:27,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:48:27,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:48:27,973 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 [2020-08-22 16:48:28,014 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:48:28,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:48:28,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:48:28,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:48:28,017 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:48:28,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:48:28,017 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:48:28,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:48:28,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:48:28,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:48:28,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:48:28,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:48:28,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:48:28,020 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:48:28,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:48:28,020 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:48:28,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:48:28,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:48:28,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:48:28,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:48:28,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:48:28,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:48:28,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:48:28,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:48:28,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:48:28,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:48:28,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:48:28,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:48:28,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:48:28,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:48:28,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:48:28,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:48:28,378 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:48:28,380 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:48:28,381 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:48:28,381 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-08-22 16:48:28,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/915efcc55/a5fafc37e14648d5bcf64ae29c3d48c0/FLAG4b77fcab2 [2020-08-22 16:48:28,943 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:48:28,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-08-22 16:48:28,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/915efcc55/a5fafc37e14648d5bcf64ae29c3d48c0/FLAG4b77fcab2 [2020-08-22 16:48:29,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/915efcc55/a5fafc37e14648d5bcf64ae29c3d48c0 [2020-08-22 16:48:29,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:48:29,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:48:29,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:48:29,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:48:29,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:48:29,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:48:29" (1/1) ... [2020-08-22 16:48:29,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bdc8455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:29, skipping insertion in model container [2020-08-22 16:48:29,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:48:29" (1/1) ... [2020-08-22 16:48:29,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:48:29,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:48:29,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:48:29,810 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:48:29,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:48:29,912 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:48:29,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:29 WrapperNode [2020-08-22 16:48:29,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:48:29,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:48:29,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:48:29,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:48:29,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:29" (1/1) ... [2020-08-22 16:48:29,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:29" (1/1) ... [2020-08-22 16:48:29,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:29" (1/1) ... [2020-08-22 16:48:29,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:29" (1/1) ... [2020-08-22 16:48:29,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:29" (1/1) ... [2020-08-22 16:48:29,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:29" (1/1) ... [2020-08-22 16:48:29,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:29" (1/1) ... [2020-08-22 16:48:29,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:48:29,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:48:29,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:48:29,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:48:29,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:29" (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 [2020-08-22 16:48:30,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:48:30,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:48:30,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 16:48:30,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 16:48:30,047 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-22 16:48:30,047 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-08-22 16:48:30,047 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:48:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:48:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:48:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 16:48:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 16:48:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 16:48:30,053 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 16:48:30,053 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 16:48:30,053 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 16:48:30,053 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 16:48:30,054 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 16:48:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 16:48:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 16:48:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 16:48:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 16:48:30,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 16:48:30,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 16:48:30,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 16:48:30,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 16:48:30,056 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 16:48:30,056 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 16:48:30,056 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 16:48:30,056 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 16:48:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 16:48:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 16:48:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 16:48:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 16:48:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 16:48:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 16:48:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 16:48:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 16:48:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 16:48:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 16:48:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 16:48:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 16:48:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 16:48:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 16:48:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 16:48:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 16:48:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 16:48:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 16:48:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 16:48:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 16:48:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 16:48:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 16:48:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 16:48:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 16:48:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 16:48:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 16:48:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 16:48:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 16:48:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 16:48:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 16:48:30,061 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 16:48:30,061 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 16:48:30,061 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 16:48:30,061 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 16:48:30,061 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 16:48:30,061 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 16:48:30,061 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 16:48:30,061 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 16:48:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 16:48:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 16:48:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 16:48:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:48:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 16:48:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 16:48:30,063 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 16:48:30,063 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 16:48:30,063 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 16:48:30,063 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 16:48:30,063 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 16:48:30,063 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 16:48:30,063 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 16:48:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 16:48:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 16:48:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 16:48:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 16:48:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 16:48:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 16:48:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 16:48:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 16:48:30,065 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 16:48:30,065 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 16:48:30,065 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 16:48:30,065 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 16:48:30,065 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 16:48:30,065 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 16:48:30,066 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 16:48:30,066 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 16:48:30,066 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 16:48:30,066 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 16:48:30,066 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 16:48:30,066 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 16:48:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 16:48:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 16:48:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 16:48:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 16:48:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 16:48:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 16:48:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 16:48:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 16:48:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 16:48:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 16:48:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 16:48:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 16:48:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 16:48:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 16:48:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-22 16:48:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-08-22 16:48:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 16:48:30,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:48:30,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 16:48:30,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:48:30,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 16:48:30,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:48:30,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:48:30,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:48:30,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:48:30,398 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-22 16:48:30,623 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:48:30,624 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 16:48:30,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:48:30 BoogieIcfgContainer [2020-08-22 16:48:30,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:48:30,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:48:30,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:48:30,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:48:30,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:48:29" (1/3) ... [2020-08-22 16:48:30,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@690bca3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:48:30, skipping insertion in model container [2020-08-22 16:48:30,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:29" (2/3) ... [2020-08-22 16:48:30,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@690bca3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:48:30, skipping insertion in model container [2020-08-22 16:48:30,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:48:30" (3/3) ... [2020-08-22 16:48:30,636 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-08-22 16:48:30,648 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:48:30,655 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:48:30,667 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:48:30,692 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:48:30,692 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:48:30,693 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:48:30,693 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:48:30,693 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:48:30,694 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:48:30,694 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:48:30,694 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:48:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-08-22 16:48:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:48:30,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:30,720 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] [2020-08-22 16:48:30,720 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:30,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:30,725 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-08-22 16:48:30,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:30,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505000362] [2020-08-22 16:48:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:30,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:30,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:48:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:48:31,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505000362] [2020-08-22 16:48:31,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:48:31,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 16:48:31,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495997159] [2020-08-22 16:48:31,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:48:31,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:31,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:48:31,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:48:31,103 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2020-08-22 16:48:31,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:31,466 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-08-22 16:48:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:48:31,468 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-22 16:48:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:31,485 INFO L225 Difference]: With dead ends: 73 [2020-08-22 16:48:31,486 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 16:48:31,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:48:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 16:48:31,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-08-22 16:48:31,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:48:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-08-22 16:48:31,553 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2020-08-22 16:48:31,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:31,553 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-08-22 16:48:31,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:48:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-08-22 16:48:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:48:31,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:31,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:31,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:48:31,558 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:31,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:31,559 INFO L82 PathProgramCache]: Analyzing trace with hash 215856973, now seen corresponding path program 1 times [2020-08-22 16:48:31,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:31,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869656117] [2020-08-22 16:48:31,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:31,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:31,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:48:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:48:31,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869656117] [2020-08-22 16:48:31,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:48:31,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:48:31,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672608432] [2020-08-22 16:48:31,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:48:31,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:31,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:48:31,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:48:31,770 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 6 states. [2020-08-22 16:48:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:31,999 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2020-08-22 16:48:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:48:32,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-22 16:48:32,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:32,001 INFO L225 Difference]: With dead ends: 63 [2020-08-22 16:48:32,001 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 16:48:32,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:48:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 16:48:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-08-22 16:48:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 16:48:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-08-22 16:48:32,021 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2020-08-22 16:48:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:32,023 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-08-22 16:48:32,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:48:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-08-22 16:48:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:48:32,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:32,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:32,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:48:32,025 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:32,026 INFO L82 PathProgramCache]: Analyzing trace with hash -795260277, now seen corresponding path program 1 times [2020-08-22 16:48:32,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:32,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850863951] [2020-08-22 16:48:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:32,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:32,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:48:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:48:32,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850863951] [2020-08-22 16:48:32,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719948511] [2020-08-22 16:48:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:32,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:48:32,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:48:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:48:32,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:48:32,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2020-08-22 16:48:32,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142755689] [2020-08-22 16:48:32,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:48:32,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:32,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:48:32,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:48:32,428 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 4 states. [2020-08-22 16:48:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:32,462 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2020-08-22 16:48:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:48:32,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-08-22 16:48:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:32,466 INFO L225 Difference]: With dead ends: 55 [2020-08-22 16:48:32,466 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 16:48:32,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:48:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 16:48:32,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-22 16:48:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 16:48:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-08-22 16:48:32,495 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2020-08-22 16:48:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:32,496 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-08-22 16:48:32,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:48:32,496 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-08-22 16:48:32,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:48:32,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:32,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:32,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-08-22 16:48:32,712 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:32,712 INFO L82 PathProgramCache]: Analyzing trace with hash -795262199, now seen corresponding path program 1 times [2020-08-22 16:48:32,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:32,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282337594] [2020-08-22 16:48:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:32,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:32,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:48:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:48:32,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282337594] [2020-08-22 16:48:32,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906924428] [2020-08-22 16:48:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:32,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:48:32,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:48:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:48:33,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:48:33,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2020-08-22 16:48:33,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818946329] [2020-08-22 16:48:33,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:48:33,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:33,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:48:33,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:48:33,074 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 9 states. [2020-08-22 16:48:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:33,289 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2020-08-22 16:48:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:48:33,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-08-22 16:48:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:33,291 INFO L225 Difference]: With dead ends: 69 [2020-08-22 16:48:33,291 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 16:48:33,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:48:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 16:48:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-22 16:48:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 16:48:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-08-22 16:48:33,299 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 27 [2020-08-22 16:48:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:33,299 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-08-22 16:48:33,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:48:33,300 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-08-22 16:48:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 16:48:33,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:33,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:33,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:33,514 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:33,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:33,515 INFO L82 PathProgramCache]: Analyzing trace with hash 260011544, now seen corresponding path program 1 times [2020-08-22 16:48:33,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:33,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819414287] [2020-08-22 16:48:33,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:33,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:33,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:48:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:48:33,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819414287] [2020-08-22 16:48:33,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198790776] [2020-08-22 16:48:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:48:33,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:48:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:48:33,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:48:33,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2020-08-22 16:48:33,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315970324] [2020-08-22 16:48:33,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:48:33,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:33,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:48:33,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:48:33,805 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 10 states. [2020-08-22 16:48:34,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:34,015 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-08-22 16:48:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:48:34,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-08-22 16:48:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:34,018 INFO L225 Difference]: With dead ends: 76 [2020-08-22 16:48:34,018 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 16:48:34,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:48:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 16:48:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-08-22 16:48:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 16:48:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-08-22 16:48:34,026 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 34 [2020-08-22 16:48:34,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:34,027 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-08-22 16:48:34,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:48:34,027 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-08-22 16:48:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 16:48:34,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:34,028 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:34,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:34,243 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:34,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:34,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1408992297, now seen corresponding path program 2 times [2020-08-22 16:48:34,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:34,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652271937] [2020-08-22 16:48:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:34,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:34,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:48:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:48:34,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652271937] [2020-08-22 16:48:34,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761886795] [2020-08-22 16:48:34,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:34,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:48:34,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:48:34,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:48:34,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:48:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:48:34,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:48:34,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2020-08-22 16:48:34,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456903830] [2020-08-22 16:48:34,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:48:34,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:34,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:48:34,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:48:34,576 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 11 states. [2020-08-22 16:48:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:34,804 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-08-22 16:48:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:48:34,804 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-08-22 16:48:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:34,806 INFO L225 Difference]: With dead ends: 83 [2020-08-22 16:48:34,806 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 16:48:34,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:48:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 16:48:34,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-08-22 16:48:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 16:48:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-08-22 16:48:34,814 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 41 [2020-08-22 16:48:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:34,814 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-08-22 16:48:34,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:48:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-08-22 16:48:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 16:48:34,816 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:34,816 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:35,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:35,031 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:35,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:35,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 3 times [2020-08-22 16:48:35,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:35,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795185755] [2020-08-22 16:48:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:35,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:48:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:35,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:48:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:48:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:48:35,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795185755] [2020-08-22 16:48:35,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427408471] [2020-08-22 16:48:35,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:48:35,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-08-22 16:48:35,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:48:35,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:48:35,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:48:35,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:35,990 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2020-08-22 16:48:35,990 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:36,000 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:36,000 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:36,001 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:23 [2020-08-22 16:48:36,048 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_int_21|], 10=[|v_#memory_int_23|]} [2020-08-22 16:48:36,054 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-08-22 16:48:36,070 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:36,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:36,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:36,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:36,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:36,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:36,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:36,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:36,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:36,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:36,091 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:36,091 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2020-08-22 16:48:36,093 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:36,103 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:36,106 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:36,106 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:66, output treesize:23 [2020-08-22 16:48:36,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:36,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:36,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:48:36,125 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:36,125 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2020-08-22 16:48:36,127 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:48:36,133 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:48:36,137 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:48:36,137 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:20 [2020-08-22 16:48:36,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-08-22 16:48:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:48:36,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:48:36,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2020-08-22 16:48:36,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880270587] [2020-08-22 16:48:36,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 16:48:36,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:48:36,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 16:48:36,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:48:36,330 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 21 states. [2020-08-22 16:48:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:48:37,711 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2020-08-22 16:48:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 16:48:37,712 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-08-22 16:48:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:48:37,714 INFO L225 Difference]: With dead ends: 104 [2020-08-22 16:48:37,714 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 16:48:37,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 16:48:37,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 16:48:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2020-08-22 16:48:37,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 16:48:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-08-22 16:48:37,724 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 48 [2020-08-22 16:48:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:48:37,724 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-08-22 16:48:37,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 16:48:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-08-22 16:48:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 16:48:37,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:48:37,726 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:48:37,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-08-22 16:48:37,928 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:48:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:48:37,928 INFO L82 PathProgramCache]: Analyzing trace with hash 895583181, now seen corresponding path program 1 times [2020-08-22 16:48:37,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:48:37,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656168182] [2020-08-22 16:48:37,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:48:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:48:38,007 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:48:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:48:38,063 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:48:38,103 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:48:38,104 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:48:38,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 16:48:38,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:48:38 BoogieIcfgContainer [2020-08-22 16:48:38,168 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:48:38,170 INFO L168 Benchmark]: Toolchain (without parser) took 8888.76 ms. Allocated memory was 139.5 MB in the beginning and 289.4 MB in the end (delta: 149.9 MB). Free memory was 101.8 MB in the beginning and 99.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 152.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:48:38,171 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:48:38,172 INFO L168 Benchmark]: CACSL2BoogieTranslator took 631.09 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.6 MB in the beginning and 166.3 MB in the end (delta: -64.8 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:48:38,174 INFO L168 Benchmark]: Boogie Preprocessor took 71.13 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 163.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-22 16:48:38,175 INFO L168 Benchmark]: RCFGBuilder took 643.03 ms. Allocated memory is still 202.4 MB. Free memory was 162.9 MB in the beginning and 116.6 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:48:38,176 INFO L168 Benchmark]: TraceAbstraction took 7538.94 ms. Allocated memory was 202.4 MB in the beginning and 289.4 MB in the end (delta: 87.0 MB). Free memory was 116.6 MB in the beginning and 99.5 MB in the end (delta: 17.1 MB). Peak memory consumption was 104.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:48:38,184 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 631.09 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.6 MB in the beginning and 166.3 MB in the end (delta: -64.8 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.13 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 163.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 643.03 ms. Allocated memory is still 202.4 MB. Free memory was 162.9 MB in the beginning and 116.6 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7538.94 ms. Allocated memory was 202.4 MB in the beginning and 289.4 MB in the end (delta: 87.0 MB). Free memory was 116.6 MB in the beginning and 99.5 MB in the end (delta: 17.1 MB). Peak memory consumption was 104.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; VAL [len=5] [L589] CALL, EXPR dll_create(len) VAL [\old(len)=5] [L568] DLL head = ((void *)0); VAL [\old(len)=5, head={0:0}, len=5] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=5, __VERIFIER_nondet_int() == len? 1 : 0=1, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L579] COND FALSE !(\read(head)) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=4, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=3, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=2, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=1, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-5:0}, len=0, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L569] COND FALSE !(len > 0) VAL [\old(len)=5, head={-5:0}, len=0, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L585] return head; VAL [\old(len)=5, \result={-5:0}, head={-5:0}, len=0, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L589] RET, EXPR dll_create(len) VAL [dll_create(len)={-5:0}, len=5] [L589] DLL head = dll_create(len); [L590] head->next VAL [head={-5:0}, head->next={-4:0}, len=5] [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 VAL [0 != head->data_0 || 0 != head->data_1=0, head={-5:0}, head->data_0=0, head->data_1=0, len=5] [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [0 != head->data_0 || 0 != head->data_1=0, 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2=1, head={-5:0}, head->data_0=0, head->data_1=0, head->data_2=1, len=5] [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() VAL [head={-5:0}, len=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.4s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 242 SDtfs, 448 SDslu, 939 SDs, 0 SdLazy, 962 SolverSat, 168 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 288 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 43 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 456 NumberOfCodeBlocks, 449 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 389 ConstructedInterpolants, 0 QuantifiedInterpolants, 48760 SizeOfPredicates, 20 NumberOfNonLiveVariables, 808 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 41/163 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...