/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 --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:32:56,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:32:56,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:32:56,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:32:56,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:32:56,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:32:56,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:32:56,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:32:56,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:32:56,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:32:56,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:32:56,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:32:56,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:32:56,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:32:56,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:32:56,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:32:56,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:32:56,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:32:56,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:32:56,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:32:56,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:32:56,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:32:56,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:32:56,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:32:56,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 21:32:56,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 21:32:56,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 21:32:56,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 21:32:56,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 21:32:56,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-19 21:32:56,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-19 21:32:56,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-19 21:32:56,769 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-19 21:32:56,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-19 21:32:56,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-19 21:32:56,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-19 21:32:56,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-19 21:32:56,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-19 21:32:56,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:32:56,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:32:56,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:32:56,780 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 [2020-07-19 21:32:56,816 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:32:56,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:32:56,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:32:56,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:32:56,824 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:32:56,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:32:56,825 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:32:56,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:32:56,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:32:56,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:32:56,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:32:56,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:32:56,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:32:56,827 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:32:56,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:32:56,827 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:32:56,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:32:56,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:32:56,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:32:56,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:32:56,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:32:56,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:32:56,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:32:56,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:32:56,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:32:56,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:32:56,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:32:56,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:32:56,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:32:56,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:32:57,163 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:32:57,184 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:32:57,189 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:32:57,190 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:32:57,193 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:32:57,194 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-07-19 21:32:57,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42f64dfad/48f62cddeb2b42ffbda5574df69e6a87/FLAG5125bc318 [2020-07-19 21:32:57,740 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:32:57,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-07-19 21:32:57,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42f64dfad/48f62cddeb2b42ffbda5574df69e6a87/FLAG5125bc318 [2020-07-19 21:32:58,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42f64dfad/48f62cddeb2b42ffbda5574df69e6a87 [2020-07-19 21:32:58,099 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:32:58,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:32:58,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:32:58,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:32:58,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:32:58,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:32:58" (1/1) ... [2020-07-19 21:32:58,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aca2709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:58, skipping insertion in model container [2020-07-19 21:32:58,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:32:58" (1/1) ... [2020-07-19 21:32:58,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:32:58,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:32:58,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:32:58,680 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:32:58,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:32:58,781 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:32:58,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:58 WrapperNode [2020-07-19 21:32:58,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:32:58,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:32:58,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:32:58,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:32:58,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:58" (1/1) ... [2020-07-19 21:32:58,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:58" (1/1) ... [2020-07-19 21:32:58,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:58" (1/1) ... [2020-07-19 21:32:58,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:58" (1/1) ... [2020-07-19 21:32:58,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:58" (1/1) ... [2020-07-19 21:32:58,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:58" (1/1) ... [2020-07-19 21:32:58,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:58" (1/1) ... [2020-07-19 21:32:58,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:32:58,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:32:58,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:32:58,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:32:58,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:32:58,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:32:58,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:32:58,928 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-19 21:32:58,928 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-19 21:32:58,928 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-07-19 21:32:58,928 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-07-19 21:32:58,928 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-07-19 21:32:58,928 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-07-19 21:32:58,928 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-19 21:32:58,928 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:32:58,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:32:58,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:32:58,929 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-19 21:32:58,929 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-19 21:32:58,929 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-19 21:32:58,930 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-19 21:32:58,930 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-19 21:32:58,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-19 21:32:58,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-19 21:32:58,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-19 21:32:58,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-19 21:32:58,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-19 21:32:58,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-19 21:32:58,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-19 21:32:58,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-19 21:32:58,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-19 21:32:58,931 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-19 21:32:58,932 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-19 21:32:58,932 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-19 21:32:58,932 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-19 21:32:58,932 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-19 21:32:58,932 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-19 21:32:58,932 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-19 21:32:58,932 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-19 21:32:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-19 21:32:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-19 21:32:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-19 21:32:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-19 21:32:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-19 21:32:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-19 21:32:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-19 21:32:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-19 21:32:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-19 21:32:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-19 21:32:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-19 21:32:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-19 21:32:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-19 21:32:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-19 21:32:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-19 21:32:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-19 21:32:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-19 21:32:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-19 21:32:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-19 21:32:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-19 21:32:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-19 21:32:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-19 21:32:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-19 21:32:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-19 21:32:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-19 21:32:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-19 21:32:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-19 21:32:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-19 21:32:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-19 21:32:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-19 21:32:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-19 21:32:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-19 21:32:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-19 21:32:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-19 21:32:58,937 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-19 21:32:58,937 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-19 21:32:58,937 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-19 21:32:58,937 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-19 21:32:58,937 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-19 21:32:58,937 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 21:32:58,937 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-19 21:32:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-19 21:32:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-19 21:32:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-19 21:32:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-19 21:32:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-19 21:32:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-19 21:32:58,938 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-19 21:32:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-19 21:32:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-19 21:32:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-19 21:32:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-19 21:32:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-19 21:32:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-19 21:32:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-19 21:32:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-19 21:32:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-19 21:32:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-19 21:32:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-19 21:32:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-19 21:32:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-19 21:32:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-19 21:32:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-19 21:32:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-19 21:32:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-19 21:32:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-19 21:32:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-19 21:32:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-19 21:32:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-19 21:32:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-19 21:32:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-19 21:32:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-19 21:32:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-19 21:32:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-19 21:32:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-19 21:32:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-19 21:32:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-19 21:32:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-19 21:32:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-19 21:32:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-19 21:32:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-19 21:32:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-19 21:32:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-19 21:32:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-07-19 21:32:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-19 21:32:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-07-19 21:32:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-19 21:32:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-19 21:32:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-07-19 21:32:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-07-19 21:32:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 21:32:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-19 21:32:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:32:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 21:32:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 21:32:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:32:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:32:59,246 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-19 21:32:59,616 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:32:59,617 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-19 21:32:59,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:32:59 BoogieIcfgContainer [2020-07-19 21:32:59,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:32:59,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:32:59,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:32:59,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:32:59,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:32:58" (1/3) ... [2020-07-19 21:32:59,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72af3397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:32:59, skipping insertion in model container [2020-07-19 21:32:59,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:58" (2/3) ... [2020-07-19 21:32:59,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72af3397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:32:59, skipping insertion in model container [2020-07-19 21:32:59,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:32:59" (3/3) ... [2020-07-19 21:32:59,629 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2020-07-19 21:32:59,640 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:32:59,648 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:32:59,663 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:32:59,689 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:32:59,689 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:32:59,689 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:32:59,690 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:32:59,690 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:32:59,690 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:32:59,690 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:32:59,690 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:32:59,711 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-07-19 21:32:59,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 21:32:59,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:32:59,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:32:59,720 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:32:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:32:59,727 INFO L82 PathProgramCache]: Analyzing trace with hash 407034730, now seen corresponding path program 1 times [2020-07-19 21:32:59,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:32:59,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968309440] [2020-07-19 21:32:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2135b806 [2020-07-19 21:32:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:32:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:32:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:32:59,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968309440] [2020-07-19 21:32:59,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:32:59,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:32:59,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427007848] [2020-07-19 21:32:59,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:32:59,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:32:59,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:32:59,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:32:59,981 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 3 states. [2020-07-19 21:33:00,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:33:00,165 INFO L93 Difference]: Finished difference Result 95 states and 129 transitions. [2020-07-19 21:33:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:33:00,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-19 21:33:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:33:00,176 INFO L225 Difference]: With dead ends: 95 [2020-07-19 21:33:00,177 INFO L226 Difference]: Without dead ends: 18 [2020-07-19 21:33:00,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:33:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-19 21:33:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-19 21:33:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-19 21:33:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-19 21:33:00,220 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-19 21:33:00,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:33:00,221 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-19 21:33:00,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:33:00,221 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-19 21:33:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 21:33:00,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:33:00,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:33:00,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:33:00,223 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:33:00,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:33:00,224 INFO L82 PathProgramCache]: Analyzing trace with hash -709462780, now seen corresponding path program 1 times [2020-07-19 21:33:00,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:33:00,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314247208] [2020-07-19 21:33:00,224 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2135b806 [2020-07-19 21:33:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:33:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:33:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:33:00,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314247208] [2020-07-19 21:33:00,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:33:00,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 21:33:00,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918358433] [2020-07-19 21:33:00,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:33:00,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:33:00,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:33:00,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:33:00,340 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-07-19 21:33:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:33:00,459 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-07-19 21:33:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:33:00,460 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-19 21:33:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:33:00,461 INFO L225 Difference]: With dead ends: 33 [2020-07-19 21:33:00,461 INFO L226 Difference]: Without dead ends: 31 [2020-07-19 21:33:00,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:33:00,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-19 21:33:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-07-19 21:33:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-19 21:33:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-19 21:33:00,469 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-07-19 21:33:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:33:00,469 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-19 21:33:00,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:33:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-19 21:33:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-19 21:33:00,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:33:00,470 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:33:00,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:33:00,471 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:33:00,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:33:00,471 INFO L82 PathProgramCache]: Analyzing trace with hash -66753378, now seen corresponding path program 1 times [2020-07-19 21:33:00,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:33:00,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136506259] [2020-07-19 21:33:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2135b806 [2020-07-19 21:33:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:33:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:33:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:33:00,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136506259] [2020-07-19 21:33:00,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723689090] [2020-07-19 21:33:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2135b806 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 [2020-07-19 21:33:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:33:00,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 21:33:00,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:33:00,904 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-19 21:33:00,905 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 21:33:00,916 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 21:33:00,920 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-19 21:33:00,921 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-19 21:33:00,927 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 21:33:00,928 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 21:33:00,928 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-07-19 21:33:00,951 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-19 21:33:00,952 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 21:33:00,961 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 21:33:00,964 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-19 21:33:00,965 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-19 21:33:00,969 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 21:33:00,970 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 21:33:00,970 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-07-19 21:33:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:33:00,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:33:00,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2020-07-19 21:33:00,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046457522] [2020-07-19 21:33:00,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:33:00,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:33:00,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:33:00,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:33:00,976 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-07-19 21:33:01,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:33:01,077 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-07-19 21:33:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:33:01,078 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-07-19 21:33:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:33:01,079 INFO L225 Difference]: With dead ends: 37 [2020-07-19 21:33:01,079 INFO L226 Difference]: Without dead ends: 27 [2020-07-19 21:33:01,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:33:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-19 21:33:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-07-19 21:33:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-19 21:33:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-19 21:33:01,085 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-19 21:33:01,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:33:01,086 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-19 21:33:01,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:33:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-19 21:33:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-19 21:33:01,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:33:01,087 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:33:01,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 21:33:01,301 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:33:01,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:33:01,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1381959275, now seen corresponding path program 1 times [2020-07-19 21:33:01,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:33:01,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343741245] [2020-07-19 21:33:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2135b806 [2020-07-19 21:33:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:33:01,330 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:33:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:33:01,352 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:33:01,378 INFO L174 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2020-07-19 21:33:01,378 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 21:33:01,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-19 21:33:01,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:33:01 BoogieIcfgContainer [2020-07-19 21:33:01,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:33:01,410 INFO L168 Benchmark]: Toolchain (without parser) took 3309.32 ms. Allocated memory was 141.0 MB in the beginning and 235.9 MB in the end (delta: 94.9 MB). Free memory was 100.3 MB in the beginning and 90.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 104.5 MB. Max. memory is 7.1 GB. [2020-07-19 21:33:01,411 INFO L168 Benchmark]: CDTParser took 1.16 ms. Allocated memory is still 141.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-19 21:33:01,412 INFO L168 Benchmark]: CACSL2BoogieTranslator took 679.17 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 99.9 MB in the beginning and 167.9 MB in the end (delta: -68.0 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2020-07-19 21:33:01,413 INFO L168 Benchmark]: Boogie Preprocessor took 79.33 ms. Allocated memory is still 202.9 MB. Free memory was 167.9 MB in the beginning and 164.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-07-19 21:33:01,413 INFO L168 Benchmark]: RCFGBuilder took 757.51 ms. Allocated memory is still 202.9 MB. Free memory was 164.5 MB in the beginning and 106.8 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. [2020-07-19 21:33:01,414 INFO L168 Benchmark]: TraceAbstraction took 1785.75 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 106.8 MB in the beginning and 90.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 49.1 MB. Max. memory is 7.1 GB. [2020-07-19 21:33:01,419 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.16 ms. Allocated memory is still 141.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 679.17 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 99.9 MB in the beginning and 167.9 MB in the end (delta: -68.0 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 79.33 ms. Allocated memory is still 202.9 MB. Free memory was 167.9 MB in the beginning and 164.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 757.51 ms. Allocated memory is still 202.9 MB. Free memory was 164.5 MB in the beginning and 106.8 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1785.75 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 106.8 MB in the beginning and 90.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 49.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L585] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L586] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L587] List t; [L588] List p = a; [L589] a->h = 2 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L590] COND TRUE __VERIFIER_nondet_int() [L591] p->h = 1 [L592] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L593] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L594] p->n = t [L595] EXPR p->n [L595] p = p->n [L590] COND FALSE !(__VERIFIER_nondet_int()) [L597] p->h = 2 [L598] p->n = 0 [L599] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L600] COND TRUE p!=0 [L601] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-2:0}] [L601] COND TRUE p->h != 2 [L602] __VERIFIER_error() VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 56 SDslu, 76 SDs, 0 SdLazy, 141 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 4732 SizeOfPredicates, 7 NumberOfNonLiveVariables, 79 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 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...