/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 0.1.25-267fbe0 [2020-07-17 12:04:11,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:04:11,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:04:11,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:04:11,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:04:11,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:04:11,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:04:11,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:04:11,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:04:11,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:04:11,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:04:11,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:04:11,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:04:11,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:04:11,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:04:11,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:04:11,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:04:11,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:04:11,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:04:11,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:04:11,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:04:11,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:04:11,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:04:11,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:04:11,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 12:04:11,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 12:04:11,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 12:04:11,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 12:04:11,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 12:04:11,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 12:04:11,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 12:04:11,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 12:04:11,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 12:04:11,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 12:04:11,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 12:04:11,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 12:04:11,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 12:04:11,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 12:04:11,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:04:11,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:04:11,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:04:11,826 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 [2020-07-17 12:04:11,840 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:04:11,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:04:11,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:04:11,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:04:11,842 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:04:11,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:04:11,843 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:04:11,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:04:11,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:04:11,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:04:11,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:04:11,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:04:11,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:04:11,844 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:04:11,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:04:11,844 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:04:11,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:04:11,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:04:11,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:04:11,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:04:11,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:04:11,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:04:11,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:04:11,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:04:11,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:04:11,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:04:11,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:04:11,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:04:11,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:04:11,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:04:12,165 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:04:12,181 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:04:12,186 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:04:12,187 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:04:12,187 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:04:12,188 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-17 12:04:12,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3056415a6/7a65fda7160b461c8064edbe625d0967/FLAG7aae9caa2 [2020-07-17 12:04:12,814 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:04:12,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-17 12:04:12,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3056415a6/7a65fda7160b461c8064edbe625d0967/FLAG7aae9caa2 [2020-07-17 12:04:13,097 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3056415a6/7a65fda7160b461c8064edbe625d0967 [2020-07-17 12:04:13,107 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:04:13,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:04:13,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:04:13,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:04:13,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:04:13,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:04:13" (1/1) ... [2020-07-17 12:04:13,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d77b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:04:13, skipping insertion in model container [2020-07-17 12:04:13,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:04:13" (1/1) ... [2020-07-17 12:04:13,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:04:13,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:04:13,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:04:13,635 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:04:13,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:04:13,743 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:04:13,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:04:13 WrapperNode [2020-07-17 12:04:13,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:04:13,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:04:13,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:04:13,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:04:13,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:04:13" (1/1) ... [2020-07-17 12:04:13,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:04:13" (1/1) ... [2020-07-17 12:04:13,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:04:13" (1/1) ... [2020-07-17 12:04:13,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:04:13" (1/1) ... [2020-07-17 12:04:13,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:04:13" (1/1) ... [2020-07-17 12:04:13,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:04:13" (1/1) ... [2020-07-17 12:04:13,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:04:13" (1/1) ... [2020-07-17 12:04:13,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:04:13,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:04:13,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:04:13,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:04:13,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:04:13" (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 [2020-07-17 12:04:13,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:04:13,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:04:13,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-17 12:04:13,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-17 12:04:13,878 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-17 12:04:13,878 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-07-17 12:04:13,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:04:13,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:04:13,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:04:13,879 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-17 12:04:13,879 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-17 12:04:13,879 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-17 12:04:13,880 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-17 12:04:13,880 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-17 12:04:13,880 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-17 12:04:13,880 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-17 12:04:13,880 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-17 12:04:13,880 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-17 12:04:13,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-17 12:04:13,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-17 12:04:13,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-17 12:04:13,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-17 12:04:13,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-17 12:04:13,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-17 12:04:13,882 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-17 12:04:13,882 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-17 12:04:13,882 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-17 12:04:13,882 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-17 12:04:13,882 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-17 12:04:13,882 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-17 12:04:13,882 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-17 12:04:13,883 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-17 12:04:13,883 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-17 12:04:13,883 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-17 12:04:13,883 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-17 12:04:13,883 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-17 12:04:13,883 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-17 12:04:13,884 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-17 12:04:13,884 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-17 12:04:13,884 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-17 12:04:13,884 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-17 12:04:13,884 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-17 12:04:13,884 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-17 12:04:13,885 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-17 12:04:13,885 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-17 12:04:13,885 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-17 12:04:13,885 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-17 12:04:13,885 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-17 12:04:13,885 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-17 12:04:13,885 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-17 12:04:13,886 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-17 12:04:13,886 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-17 12:04:13,886 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-17 12:04:13,886 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-17 12:04:13,886 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-17 12:04:13,886 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-17 12:04:13,886 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-17 12:04:13,886 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-17 12:04:13,886 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-17 12:04:13,887 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-17 12:04:13,887 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-17 12:04:13,887 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 12:04:13,887 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-17 12:04:13,887 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-17 12:04:13,887 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-17 12:04:13,887 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-17 12:04:13,888 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-17 12:04:13,888 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-17 12:04:13,888 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-17 12:04:13,888 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-17 12:04:13,888 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:04:13,888 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-17 12:04:13,888 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-17 12:04:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-17 12:04:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-17 12:04:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-17 12:04:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-17 12:04:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-17 12:04:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-17 12:04:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-17 12:04:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-17 12:04:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-17 12:04:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-17 12:04:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-17 12:04:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-17 12:04:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-17 12:04:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-17 12:04:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-17 12:04:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-17 12:04:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-17 12:04:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-17 12:04:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-17 12:04:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-17 12:04:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-17 12:04:13,892 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-17 12:04:13,892 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-17 12:04:13,892 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-17 12:04:13,892 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-17 12:04:13,892 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-17 12:04:13,892 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-17 12:04:13,892 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-17 12:04:13,893 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-17 12:04:13,893 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-17 12:04:13,893 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-17 12:04:13,893 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-17 12:04:13,893 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-17 12:04:13,893 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-17 12:04:13,893 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-17 12:04:13,893 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-17 12:04:13,893 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-17 12:04:13,893 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-17 12:04:13,893 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-17 12:04:13,894 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-17 12:04:13,894 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-17 12:04:13,894 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-17 12:04:13,894 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-07-17 12:04:13,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 12:04:13,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 12:04:13,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-17 12:04:13,895 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:04:13,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-17 12:04:13,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 12:04:13,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 12:04:13,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:04:13,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:04:14,221 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-17 12:04:14,429 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:04:14,429 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 12:04:14,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:04:14 BoogieIcfgContainer [2020-07-17 12:04:14,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:04:14,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:04:14,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:04:14,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:04:14,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:04:13" (1/3) ... [2020-07-17 12:04:14,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4820ceeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:04:14, skipping insertion in model container [2020-07-17 12:04:14,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:04:13" (2/3) ... [2020-07-17 12:04:14,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4820ceeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:04:14, skipping insertion in model container [2020-07-17 12:04:14,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:04:14" (3/3) ... [2020-07-17 12:04:14,444 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-07-17 12:04:14,455 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:04:14,463 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:04:14,477 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:04:14,499 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:04:14,499 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:04:14,500 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:04:14,500 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:04:14,500 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:04:14,500 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:04:14,501 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:04:14,501 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:04:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-17 12:04:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-17 12:04:14,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:04:14,524 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] [2020-07-17 12:04:14,524 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:04:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:04:14,529 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-07-17 12:04:14,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:04:14,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029876587] [2020-07-17 12:04:14,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:04:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:04:14,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029876587] [2020-07-17 12:04:14,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:04:14,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 12:04:14,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102369461] [2020-07-17 12:04:14,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:04:14,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:04:14,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:04:14,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:04:14,950 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2020-07-17 12:04:15,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:04:15,291 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-17 12:04:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:04:15,293 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-17 12:04:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:04:15,302 INFO L225 Difference]: With dead ends: 73 [2020-07-17 12:04:15,303 INFO L226 Difference]: Without dead ends: 39 [2020-07-17 12:04:15,306 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 [2020-07-17 12:04:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-17 12:04:15,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-07-17 12:04:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 12:04:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-07-17 12:04:15,349 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2020-07-17 12:04:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:04:15,350 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-07-17 12:04:15,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:04:15,350 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-07-17 12:04:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 12:04:15,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:04:15,351 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] [2020-07-17 12:04:15,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:04:15,352 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:04:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:04:15,352 INFO L82 PathProgramCache]: Analyzing trace with hash 215856973, now seen corresponding path program 1 times [2020-07-17 12:04:15,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:04:15,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430003932] [2020-07-17 12:04:15,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:04:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:04:15,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430003932] [2020-07-17 12:04:15,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:04:15,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 12:04:15,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620316886] [2020-07-17 12:04:15,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:04:15,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:04:15,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:04:15,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:04:15,506 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 6 states. [2020-07-17 12:04:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:04:15,692 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2020-07-17 12:04:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:04:15,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-17 12:04:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:04:15,694 INFO L225 Difference]: With dead ends: 63 [2020-07-17 12:04:15,695 INFO L226 Difference]: Without dead ends: 39 [2020-07-17 12:04:15,696 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 [2020-07-17 12:04:15,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-17 12:04:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-17 12:04:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-17 12:04:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-07-17 12:04:15,705 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2020-07-17 12:04:15,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:04:15,705 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-07-17 12:04:15,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:04:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-07-17 12:04:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 12:04:15,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:04:15,707 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] [2020-07-17 12:04:15,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:04:15,707 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:04:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:04:15,708 INFO L82 PathProgramCache]: Analyzing trace with hash -795260277, now seen corresponding path program 1 times [2020-07-17 12:04:15,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:04:15,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528858869] [2020-07-17 12:04:15,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:04:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:04:15,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528858869] [2020-07-17 12:04:15,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506078614] [2020-07-17 12:04:15,835 INFO L94 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 [2020-07-17 12:04:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:15,980 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-17 12:04:15,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:04:16,038 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:04:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 12:04:16,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:04:16,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2020-07-17 12:04:16,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222177027] [2020-07-17 12:04:16,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:04:16,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:04:16,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:04:16,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:04:16,061 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 4 states. [2020-07-17 12:04:16,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:04:16,096 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2020-07-17 12:04:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:04:16,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-17 12:04:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:04:16,100 INFO L225 Difference]: With dead ends: 55 [2020-07-17 12:04:16,101 INFO L226 Difference]: Without dead ends: 42 [2020-07-17 12:04:16,102 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 [2020-07-17 12:04:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-17 12:04:16,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-17 12:04:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-17 12:04:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-07-17 12:04:16,111 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2020-07-17 12:04:16,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:04:16,111 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-07-17 12:04:16,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:04:16,112 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-07-17 12:04:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 12:04:16,113 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:04:16,113 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] [2020-07-17 12:04:16,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-17 12:04:16,327 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:04:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:04:16,328 INFO L82 PathProgramCache]: Analyzing trace with hash -795262199, now seen corresponding path program 1 times [2020-07-17 12:04:16,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:04:16,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087225297] [2020-07-17 12:04:16,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:04:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:04:16,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087225297] [2020-07-17 12:04:16,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925242463] [2020-07-17 12:04:16,467 INFO L94 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 [2020-07-17 12:04:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:16,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-17 12:04:16,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:04:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:04:16,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:04:16,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2020-07-17 12:04:16,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92744094] [2020-07-17 12:04:16,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 12:04:16,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:04:16,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 12:04:16,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:04:16,603 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 9 states. [2020-07-17 12:04:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:04:16,811 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2020-07-17 12:04:16,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 12:04:16,811 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-17 12:04:16,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:04:16,813 INFO L225 Difference]: With dead ends: 69 [2020-07-17 12:04:16,813 INFO L226 Difference]: Without dead ends: 49 [2020-07-17 12:04:16,814 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 [2020-07-17 12:04:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-17 12:04:16,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-17 12:04:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-17 12:04:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-07-17 12:04:16,822 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 27 [2020-07-17 12:04:16,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:04:16,822 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-07-17 12:04:16,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 12:04:16,823 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-07-17 12:04:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 12:04:16,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:04:16,824 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] [2020-07-17 12:04:17,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:04:17,038 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:04:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:04:17,038 INFO L82 PathProgramCache]: Analyzing trace with hash 260011544, now seen corresponding path program 1 times [2020-07-17 12:04:17,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:04:17,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334645797] [2020-07-17 12:04:17,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:04:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:04:17,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334645797] [2020-07-17 12:04:17,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982296615] [2020-07-17 12:04:17,165 INFO L94 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 [2020-07-17 12:04:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:17,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:04:17,270 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:04:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:04:17,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:04:17,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2020-07-17 12:04:17,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15625478] [2020-07-17 12:04:17,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 12:04:17,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:04:17,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 12:04:17,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:04:17,292 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 10 states. [2020-07-17 12:04:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:04:17,542 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-07-17 12:04:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:04:17,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-07-17 12:04:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:04:17,544 INFO L225 Difference]: With dead ends: 76 [2020-07-17 12:04:17,544 INFO L226 Difference]: Without dead ends: 56 [2020-07-17 12:04:17,545 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 [2020-07-17 12:04:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-17 12:04:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-07-17 12:04:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-17 12:04:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-17 12:04:17,552 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 34 [2020-07-17 12:04:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:04:17,553 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-17 12:04:17,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 12:04:17,553 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-17 12:04:17,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-17 12:04:17,554 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:04:17,554 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] [2020-07-17 12:04:17,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:04:17,755 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:04:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:04:17,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1408992297, now seen corresponding path program 2 times [2020-07-17 12:04:17,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:04:17,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750820535] [2020-07-17 12:04:17,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:04:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:04:17,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750820535] [2020-07-17 12:04:17,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132548240] [2020-07-17 12:04:17,950 INFO L92 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 [2020-07-17 12:04:18,052 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:04:18,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:04:18,054 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-17 12:04:18,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:04:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:04:18,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:04:18,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2020-07-17 12:04:18,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040230835] [2020-07-17 12:04:18,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:04:18,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:04:18,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:04:18,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:04:18,089 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 11 states. [2020-07-17 12:04:18,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:04:18,313 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-07-17 12:04:18,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 12:04:18,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-17 12:04:18,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:04:18,316 INFO L225 Difference]: With dead ends: 83 [2020-07-17 12:04:18,316 INFO L226 Difference]: Without dead ends: 63 [2020-07-17 12:04:18,317 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 [2020-07-17 12:04:18,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-17 12:04:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-17 12:04:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 12:04:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-07-17 12:04:18,326 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 41 [2020-07-17 12:04:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:04:18,326 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-07-17 12:04:18,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:04:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-07-17 12:04:18,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-17 12:04:18,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:04:18,328 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] [2020-07-17 12:04:18,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:04:18,544 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:04:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:04:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 3 times [2020-07-17 12:04:18,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:04:18,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207776802] [2020-07-17 12:04:18,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:04:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:04:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:04:18,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207776802] [2020-07-17 12:04:18,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379844571] [2020-07-17 12:04:18,825 INFO L92 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 [2020-07-17 12:04:19,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-17 12:04:19,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:04:19,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-17 12:04:19,444 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:04:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,543 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 [2020-07-17 12:04:19,544 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:04:19,552 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:04:19,552 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:04:19,553 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:23 [2020-07-17 12:04:19,585 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_21|], 10=[|v_#memory_int_23|]} [2020-07-17 12:04:19,592 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-17 12:04:19,609 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:04:19,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,634 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:04:19,634 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 [2020-07-17 12:04:19,635 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:04:19,646 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:04:19,647 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:04:19,648 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:66, output treesize:23 [2020-07-17 12:04:19,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:04:19,665 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:04:19,665 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 [2020-07-17 12:04:19,666 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:04:19,674 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:04:19,674 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:04:19,675 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:20 [2020-07-17 12:04:19,810 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:04:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 12:04:19,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:04:19,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2020-07-17 12:04:19,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422483644] [2020-07-17 12:04:19,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 12:04:19,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:04:19,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 12:04:19,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-07-17 12:04:19,850 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 21 states. [2020-07-17 12:04:21,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:04:21,252 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2020-07-17 12:04:21,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 12:04:21,253 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-07-17 12:04:21,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:04:21,254 INFO L225 Difference]: With dead ends: 104 [2020-07-17 12:04:21,254 INFO L226 Difference]: Without dead ends: 84 [2020-07-17 12:04:21,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2020-07-17 12:04:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-17 12:04:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2020-07-17 12:04:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-17 12:04:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-07-17 12:04:21,264 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 48 [2020-07-17 12:04:21,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:04:21,264 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-07-17 12:04:21,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 12:04:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-07-17 12:04:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-17 12:04:21,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:04:21,266 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] [2020-07-17 12:04:21,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-17 12:04:21,473 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:04:21,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:04:21,474 INFO L82 PathProgramCache]: Analyzing trace with hash 895583181, now seen corresponding path program 1 times [2020-07-17 12:04:21,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:04:21,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003233606] [2020-07-17 12:04:21,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:04:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:04:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:04:21,712 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 12:04:21,712 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 12:04:21,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 12:04:21,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:04:21 BoogieIcfgContainer [2020-07-17 12:04:21,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:04:21,796 INFO L168 Benchmark]: Toolchain (without parser) took 8687.10 ms. Allocated memory was 143.1 MB in the beginning and 303.0 MB in the end (delta: 159.9 MB). Free memory was 99.7 MB in the beginning and 166.2 MB in the end (delta: -66.5 MB). Peak memory consumption was 93.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:04:21,796 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 143.1 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-17 12:04:21,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 632.74 ms. Allocated memory was 143.1 MB in the beginning and 200.3 MB in the end (delta: 57.1 MB). Free memory was 99.3 MB in the beginning and 165.9 MB in the end (delta: -66.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:04:21,798 INFO L168 Benchmark]: Boogie Preprocessor took 62.26 ms. Allocated memory is still 200.3 MB. Free memory was 165.9 MB in the beginning and 163.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:04:21,799 INFO L168 Benchmark]: RCFGBuilder took 625.90 ms. Allocated memory is still 200.3 MB. Free memory was 163.1 MB in the beginning and 117.2 MB in the end (delta: 45.9 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. [2020-07-17 12:04:21,800 INFO L168 Benchmark]: TraceAbstraction took 7359.96 ms. Allocated memory was 200.3 MB in the beginning and 303.0 MB in the end (delta: 102.8 MB). Free memory was 116.5 MB in the beginning and 166.2 MB in the end (delta: -49.7 MB). Peak memory consumption was 53.1 MB. Max. memory is 7.1 GB. [2020-07-17 12:04:21,803 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 143.1 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 632.74 ms. Allocated memory was 143.1 MB in the beginning and 200.3 MB in the end (delta: 57.1 MB). Free memory was 99.3 MB in the beginning and 165.9 MB in the end (delta: -66.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 62.26 ms. Allocated memory is still 200.3 MB. Free memory was 165.9 MB in the beginning and 163.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 625.90 ms. Allocated memory is still 200.3 MB. Free memory was 163.1 MB in the beginning and 117.2 MB in the end (delta: 45.9 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7359.96 ms. Allocated memory was 200.3 MB in the beginning and 303.0 MB in the end (delta: 102.8 MB). Free memory was 116.5 MB in the beginning and 166.2 MB in the end (delta: -49.7 MB). Peak memory consumption was 53.1 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: 7.2s, 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: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 43 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 1.6s 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...