/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.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:30:41,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:30:41,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:30:41,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:30:41,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:30:41,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:30:41,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:30:41,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:30:41,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:30:41,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:30:41,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:30:41,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:30:41,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:30:41,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:30:41,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:30:41,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:30:41,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:30:41,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:30:41,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:30:41,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:30:41,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:30:41,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:30:41,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:30:41,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:30:41,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 01:30:41,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 01:30:41,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 01:30:41,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 01:30:41,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 01:30:41,839 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 01:30:41,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 01:30:41,840 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 01:30:41,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 01:30:41,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 01:30:41,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 01:30:41,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 01:30:41,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 01:30:41,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 01:30:41,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:30:41,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:30:41,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:30:41,847 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 [2020-07-20 01:30:41,862 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:30:41,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:30:41,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:30:41,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:30:41,864 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:30:41,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:30:41,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:30:41,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:30:41,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:30:41,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:30:41,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:30:41,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:30:41,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:30:41,865 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:30:41,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:30:41,866 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:30:41,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:30:41,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:30:41,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:30:41,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:30:41,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:30:41,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:30:41,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:30:41,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:30:41,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:30:41,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:30:41,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:30:41,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:30:41,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:30:41,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:30:42,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:30:42,164 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:30:42,168 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:30:42,169 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:30:42,170 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:30:42,171 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-20 01:30:42,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9060899e6/abe215917d7e4271bc182b21bc2552df/FLAG341f64522 [2020-07-20 01:30:42,818 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:30:42,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-20 01:30:42,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9060899e6/abe215917d7e4271bc182b21bc2552df/FLAG341f64522 [2020-07-20 01:30:43,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9060899e6/abe215917d7e4271bc182b21bc2552df [2020-07-20 01:30:43,124 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:30:43,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:30:43,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:30:43,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:30:43,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:30:43,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:30:43" (1/1) ... [2020-07-20 01:30:43,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53a95975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:43, skipping insertion in model container [2020-07-20 01:30:43,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:30:43" (1/1) ... [2020-07-20 01:30:43,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:30:43,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:30:43,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:30:43,648 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:30:43,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:30:43,749 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:30:43,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:43 WrapperNode [2020-07-20 01:30:43,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:30:43,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:30:43,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:30:43,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:30:43,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:43" (1/1) ... [2020-07-20 01:30:43,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:43" (1/1) ... [2020-07-20 01:30:43,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:43" (1/1) ... [2020-07-20 01:30:43,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:43" (1/1) ... [2020-07-20 01:30:43,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:43" (1/1) ... [2020-07-20 01:30:43,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:43" (1/1) ... [2020-07-20 01:30:43,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:43" (1/1) ... [2020-07-20 01:30:43,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:30:43,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:30:43,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:30:43,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:30:43,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:43" (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 [2020-07-20 01:30:43,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:30:43,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:30:43,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 01:30:43,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 01:30:43,884 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 01:30:43,884 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-07-20 01:30:43,884 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-07-20 01:30:43,885 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-07-20 01:30:43,885 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:30:43,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:30:43,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:30:43,885 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 01:30:43,885 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 01:30:43,886 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 01:30:43,886 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 01:30:43,886 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 01:30:43,886 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 01:30:43,886 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 01:30:43,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 01:30:43,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 01:30:43,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 01:30:43,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 01:30:43,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 01:30:43,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 01:30:43,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 01:30:43,888 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 01:30:43,888 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 01:30:43,888 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 01:30:43,888 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 01:30:43,888 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 01:30:43,888 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 01:30:43,889 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 01:30:43,889 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 01:30:43,889 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 01:30:43,889 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 01:30:43,889 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 01:30:43,889 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 01:30:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 01:30:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 01:30:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 01:30:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 01:30:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 01:30:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 01:30:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 01:30:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 01:30:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 01:30:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 01:30:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 01:30:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 01:30:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 01:30:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 01:30:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 01:30:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 01:30:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 01:30:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 01:30:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 01:30:43,893 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 01:30:43,893 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 01:30:43,893 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 01:30:43,893 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 01:30:43,893 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 01:30:43,893 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 01:30:43,894 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 01:30:43,894 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 01:30:43,894 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 01:30:43,894 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 01:30:43,894 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 01:30:43,894 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 01:30:43,895 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 01:30:43,895 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 01:30:43,895 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 01:30:43,895 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 01:30:43,895 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:30:43,895 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 01:30:43,895 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 01:30:43,896 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 01:30:43,896 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 01:30:43,896 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 01:30:43,896 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 01:30:43,896 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 01:30:43,896 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 01:30:43,897 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 01:30:43,897 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 01:30:43,897 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 01:30:43,897 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 01:30:43,897 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 01:30:43,897 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 01:30:43,897 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 01:30:43,898 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 01:30:43,898 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 01:30:43,898 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 01:30:43,898 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 01:30:43,898 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 01:30:43,898 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 01:30:43,899 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 01:30:43,899 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 01:30:43,899 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 01:30:43,899 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 01:30:43,899 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 01:30:43,899 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 01:30:43,899 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 01:30:43,900 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 01:30:43,900 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 01:30:43,900 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 01:30:43,900 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 01:30:43,900 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 01:30:43,900 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 01:30:43,900 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 01:30:43,900 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 01:30:43,901 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 01:30:43,901 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 01:30:43,901 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 01:30:43,901 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 01:30:43,901 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 01:30:43,901 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 01:30:43,901 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 01:30:43,902 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 01:30:43,902 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-07-20 01:30:43,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 01:30:43,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 01:30:43,902 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-07-20 01:30:43,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 01:30:43,903 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-07-20 01:30:43,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:30:43,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:30:43,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:30:43,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:30:44,263 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 01:30:44,407 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:30:44,408 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 01:30:44,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:30:44 BoogieIcfgContainer [2020-07-20 01:30:44,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:30:44,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:30:44,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:30:44,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:30:44,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:30:43" (1/3) ... [2020-07-20 01:30:44,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:30:44, skipping insertion in model container [2020-07-20 01:30:44,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:43" (2/3) ... [2020-07-20 01:30:44,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:30:44, skipping insertion in model container [2020-07-20 01:30:44,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:30:44" (3/3) ... [2020-07-20 01:30:44,422 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-07-20 01:30:44,434 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:30:44,444 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:30:44,460 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:30:44,489 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:30:44,489 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:30:44,489 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:30:44,490 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:30:44,490 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:30:44,490 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:30:44,490 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:30:44,491 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:30:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-20 01:30:44,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 01:30:44,517 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:30:44,519 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] [2020-07-20 01:30:44,519 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:30:44,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:30:44,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2020-07-20 01:30:44,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:30:44,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976716336] [2020-07-20 01:30:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d8303fd [2020-07-20 01:30:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:44,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976716336] [2020-07-20 01:30:44,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:30:44,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 01:30:44,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944234651] [2020-07-20 01:30:44,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 01:30:44,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:30:44,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 01:30:44,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 01:30:44,791 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-07-20 01:30:44,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:30:44,993 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2020-07-20 01:30:44,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:30:44,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-07-20 01:30:44,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:30:45,006 INFO L225 Difference]: With dead ends: 90 [2020-07-20 01:30:45,006 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 01:30:45,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:30:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 01:30:45,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-07-20 01:30:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 01:30:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-20 01:30:45,076 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-07-20 01:30:45,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:30:45,077 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-20 01:30:45,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 01:30:45,077 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-20 01:30:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 01:30:45,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:30:45,080 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] [2020-07-20 01:30:45,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:30:45,081 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:30:45,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:30:45,082 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2020-07-20 01:30:45,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:30:45,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550748702] [2020-07-20 01:30:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d8303fd [2020-07-20 01:30:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:45,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550748702] [2020-07-20 01:30:45,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:30:45,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 01:30:45,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864327813] [2020-07-20 01:30:45,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:30:45,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:30:45,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:30:45,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:30:45,276 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-07-20 01:30:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:30:45,475 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-07-20 01:30:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:30:45,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-07-20 01:30:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:30:45,477 INFO L225 Difference]: With dead ends: 45 [2020-07-20 01:30:45,477 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 01:30:45,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:30:45,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 01:30:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-20 01:30:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 01:30:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 01:30:45,487 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-07-20 01:30:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:30:45,487 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 01:30:45,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:30:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 01:30:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 01:30:45,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:30:45,489 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, 1] [2020-07-20 01:30:45,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:30:45,489 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:30:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:30:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2020-07-20 01:30:45,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:30:45,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769113171] [2020-07-20 01:30:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d8303fd [2020-07-20 01:30:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:45,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769113171] [2020-07-20 01:30:45,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106700768] [2020-07-20 01:30:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58192ba3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:30:45,776 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58192ba3 issued 2 check-sat command(s) [2020-07-20 01:30:45,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:30:45,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 01:30:45,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:30:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:45,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:30:45,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2020-07-20 01:30:45,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344834138] [2020-07-20 01:30:45,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:30:45,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:30:45,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:30:45,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:30:45,927 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2020-07-20 01:30:46,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:30:46,040 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-07-20 01:30:46,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:30:46,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 01:30:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:30:46,042 INFO L225 Difference]: With dead ends: 39 [2020-07-20 01:30:46,042 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 01:30:46,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:30:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 01:30:46,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 01:30:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 01:30:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-20 01:30:46,050 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 28 [2020-07-20 01:30:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:30:46,051 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-20 01:30:46,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:30:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-20 01:30:46,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 01:30:46,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:30:46,053 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, 1, 1] [2020-07-20 01:30:46,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 01:30:46,267 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:30:46,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:30:46,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1808388506, now seen corresponding path program 1 times [2020-07-20 01:30:46,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:30:46,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704577558] [2020-07-20 01:30:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d8303fd [2020-07-20 01:30:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:30:46,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704577558] [2020-07-20 01:30:46,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475342880] [2020-07-20 01:30:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a9cdb 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 [2020-07-20 01:30:46,517 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a9cdb issued 3 check-sat command(s) [2020-07-20 01:30:46,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:30:46,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 01:30:46,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:30:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:30:46,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:30:46,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2020-07-20 01:30:46,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57617299] [2020-07-20 01:30:46,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:30:46,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:30:46,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:30:46,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:30:46,546 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2020-07-20 01:30:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:30:46,734 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-07-20 01:30:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:30:46,734 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 01:30:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:30:46,736 INFO L225 Difference]: With dead ends: 50 [2020-07-20 01:30:46,736 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 01:30:46,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:30:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 01:30:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-20 01:30:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 01:30:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-20 01:30:46,744 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2020-07-20 01:30:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:30:46,744 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-20 01:30:46,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:30:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-20 01:30:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 01:30:46,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:30:46,746 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-07-20 01:30:46,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:30:46,960 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:30:46,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:30:46,961 INFO L82 PathProgramCache]: Analyzing trace with hash 560900285, now seen corresponding path program 2 times [2020-07-20 01:30:46,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:30:46,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656291833] [2020-07-20 01:30:46,963 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d8303fd [2020-07-20 01:30:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:30:47,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656291833] [2020-07-20 01:30:47,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306527817] [2020-07-20 01:30:47,111 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d758e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:30:47,208 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d758e issued 3 check-sat command(s) [2020-07-20 01:30:47,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:30:47,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 01:30:47,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:30:47,317 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 11 treesize of output 7 [2020-07-20 01:30:47,318 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:30:47,326 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:30:47,327 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:30:47,328 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2020-07-20 01:30:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:47,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:30:47,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2020-07-20 01:30:47,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155407514] [2020-07-20 01:30:47,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 01:30:47,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:30:47,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 01:30:47,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-07-20 01:30:47,598 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 21 states. [2020-07-20 01:30:56,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:30:56,591 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-07-20 01:30:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 01:30:56,592 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-07-20 01:30:56,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:30:56,593 INFO L225 Difference]: With dead ends: 57 [2020-07-20 01:30:56,593 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 01:30:56,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 01:30:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 01:30:56,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-20 01:30:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 01:30:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-07-20 01:30:56,612 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2020-07-20 01:30:56,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:30:56,612 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-07-20 01:30:56,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 01:30:56,613 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-07-20 01:30:56,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 01:30:56,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:30:56,615 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-07-20 01:30:56,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:30:56,816 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:30:56,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:30:56,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1265881822, now seen corresponding path program 3 times [2020-07-20 01:30:56,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:30:56,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805532764] [2020-07-20 01:30:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d8303fd [2020-07-20 01:30:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 01:30:57,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805532764] [2020-07-20 01:30:57,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661550275] [2020-07-20 01:30:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28c939e9 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 [2020-07-20 01:30:57,132 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28c939e9 issued 3 check-sat command(s) [2020-07-20 01:30:57,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:30:57,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-20 01:30:57,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:30:57,185 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-07-20 01:30:57,186 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:30:57,193 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:30:57,194 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:30:57,194 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:13 [2020-07-20 01:30:57,227 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 11 treesize of output 7 [2020-07-20 01:30:57,227 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:30:57,236 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:30:57,237 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:30:57,238 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-07-20 01:30:57,276 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:30:57,277 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 01:30:57,278 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:30:57,284 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:30:57,284 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:30:57,285 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:16 [2020-07-20 01:30:57,314 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_9|], 2=[|v_#memory_$Pointer$.base_11|]} [2020-07-20 01:30:57,319 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 11 treesize of output 7 [2020-07-20 01:30:57,320 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:30:57,328 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:30:57,333 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2020-07-20 01:30:57,334 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 01:30:57,341 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:30:57,342 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:30:57,342 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:28 [2020-07-20 01:30:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:57,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:30:57,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2020-07-20 01:30:57,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980853497] [2020-07-20 01:30:57,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 01:30:57,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:30:57,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 01:30:57,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-07-20 01:30:57,804 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 24 states. [2020-07-20 01:30:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:30:59,155 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-07-20 01:30:59,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 01:30:59,156 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2020-07-20 01:30:59,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:30:59,157 INFO L225 Difference]: With dead ends: 57 [2020-07-20 01:30:59,157 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 01:30:59,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 01:30:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 01:30:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2020-07-20 01:30:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 01:30:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-07-20 01:30:59,168 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 36 [2020-07-20 01:30:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:30:59,168 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-07-20 01:30:59,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 01:30:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-07-20 01:30:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 01:30:59,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:30:59,170 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-07-20 01:30:59,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:30:59,384 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:30:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:30:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 4 times [2020-07-20 01:30:59,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:30:59,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522887481] [2020-07-20 01:30:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d8303fd [2020-07-20 01:30:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:30:59,421 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:30:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:30:59,436 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:30:59,465 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 01:30:59,466 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 01:30:59,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 01:30:59,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:30:59 BoogieIcfgContainer [2020-07-20 01:30:59,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:30:59,508 INFO L168 Benchmark]: Toolchain (without parser) took 16382.67 ms. Allocated memory was 136.3 MB in the beginning and 293.1 MB in the end (delta: 156.8 MB). Free memory was 99.4 MB in the beginning and 129.5 MB in the end (delta: -30.1 MB). Peak memory consumption was 126.7 MB. Max. memory is 7.1 GB. [2020-07-20 01:30:59,508 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 01:30:59,509 INFO L168 Benchmark]: CACSL2BoogieTranslator took 623.00 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 99.0 MB in the beginning and 168.0 MB in the end (delta: -69.0 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2020-07-20 01:30:59,510 INFO L168 Benchmark]: Boogie Preprocessor took 59.41 ms. Allocated memory is still 201.3 MB. Free memory was 168.0 MB in the beginning and 165.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 01:30:59,511 INFO L168 Benchmark]: RCFGBuilder took 602.26 ms. Allocated memory is still 201.3 MB. Free memory was 165.3 MB in the beginning and 122.3 MB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:30:59,512 INFO L168 Benchmark]: TraceAbstraction took 15092.05 ms. Allocated memory was 201.3 MB in the beginning and 293.1 MB in the end (delta: 91.8 MB). Free memory was 121.6 MB in the beginning and 129.5 MB in the end (delta: -7.9 MB). Peak memory consumption was 83.9 MB. Max. memory is 7.1 GB. [2020-07-20 01:30:59,515 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 623.00 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 99.0 MB in the beginning and 168.0 MB in the end (delta: -69.0 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.41 ms. Allocated memory is still 201.3 MB. Free memory was 168.0 MB in the beginning and 165.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 602.26 ms. Allocated memory is still 201.3 MB. Free memory was 165.3 MB in the beginning and 122.3 MB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15092.05 ms. Allocated memory was 201.3 MB in the beginning and 293.1 MB in the end (delta: 91.8 MB). Free memory was 121.6 MB in the beginning and 129.5 MB in the end (delta: -7.9 MB). Peak memory consumption was 83.9 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: [L592] int len = 2; VAL [len=2] [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0] [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) VAL [\old(len)=3] [L564] SLL head = ((void *)0); VAL [\old(len)=3, head={0:0}, len=3] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L565] COND FALSE !(len > 0) VAL [\old(len)=3, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L574] return head; VAL [\old(len)=3, \result={-3:0}, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L596] RET, EXPR sll_create(len + 1) VAL [len=2, sll_create(len + 1)={-3:0}] [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) VAL [head={-3:0}] [L577] int len = 0; VAL [head={-3:0}, head={-3:0}, len=0] [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) VAL [head={0:0}, head={-3:0}, len=3] [L582] return len; VAL [\result=3, head={-3:0}, head={0:0}, len=3] [L597] RET, EXPR sll_length(s) VAL [len=2, s={-3:0}, sll_length(s)=3] [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() VAL [len=2, s={-3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.9s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 11.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 151 SDtfs, 306 SDslu, 587 SDs, 0 SdLazy, 1294 SolverSat, 122 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 9.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 241 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred 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, 6 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 335 NumberOfCodeBlocks, 299 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 288 ConstructedInterpolants, 13 QuantifiedInterpolants, 42991 SizeOfPredicates, 34 NumberOfNonLiveVariables, 464 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 22/48 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...