/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:07:03,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:07:03,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:07:03,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:07:03,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:07:03,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:07:03,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:07:03,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:07:03,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:07:03,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:07:03,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:07:03,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:07:03,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:07:03,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:07:03,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:07:03,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:07:03,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:07:03,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:07:03,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:07:03,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:07:03,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:07:03,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:07:03,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:07:03,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:07:03,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 19:07:03,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 19:07:03,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 19:07:03,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 19:07:03,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 19:07:03,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 19:07:03,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 19:07:03,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 19:07:03,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 19:07:03,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 19:07:03,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 19:07:03,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 19:07:03,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 19:07:03,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 19:07:03,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:07:03,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:07:03,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:07:03,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:07:03,803 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:07:03,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:07:03,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:07:03,805 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:07:03,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:07:03,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:07:03,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:07:03,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:07:03,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:07:03,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:07:03,806 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:07:03,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:07:03,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:07:03,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:07:03,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:07:03,807 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:07:03,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:07:03,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:07:03,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:07:03,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:07:03,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:07:03,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:07:03,809 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:07:04,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:07:04,143 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:07:04,146 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:07:04,147 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:07:04,148 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:07:04,149 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-08-22 19:07:04,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84d7a4241/2c2d3ef9435c45568aaeb810b743c841/FLAGb765f1a41 [2020-08-22 19:07:04,707 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:07:04,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-08-22 19:07:04,727 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84d7a4241/2c2d3ef9435c45568aaeb810b743c841/FLAGb765f1a41 [2020-08-22 19:07:05,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84d7a4241/2c2d3ef9435c45568aaeb810b743c841 [2020-08-22 19:07:05,071 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:07:05,075 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:07:05,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:07:05,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:07:05,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:07:05,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:07:05" (1/1) ... [2020-08-22 19:07:05,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62ad1fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:07:05, skipping insertion in model container [2020-08-22 19:07:05,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:07:05" (1/1) ... [2020-08-22 19:07:05,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:07:05,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:07:05,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:07:05,664 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:07:05,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:07:05,785 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:07:05,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:07:05 WrapperNode [2020-08-22 19:07:05,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:07:05,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:07:05,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:07:05,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:07:05,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:07:05" (1/1) ... [2020-08-22 19:07:05,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:07:05" (1/1) ... [2020-08-22 19:07:05,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:07:05" (1/1) ... [2020-08-22 19:07:05,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:07:05" (1/1) ... [2020-08-22 19:07:05,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:07:05" (1/1) ... [2020-08-22 19:07:05,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:07:05" (1/1) ... [2020-08-22 19:07:05,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:07:05" (1/1) ... [2020-08-22 19:07:05,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:07:05,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:07:05,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:07:05,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:07:05,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:07:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:07:05,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:07:05,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:07:05,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 19:07:05,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 19:07:05,909 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-22 19:07:05,909 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-08-22 19:07:05,910 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-08-22 19:07:05,910 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-08-22 19:07:05,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:07:05,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:07:05,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:07:05,910 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 19:07:05,910 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 19:07:05,911 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 19:07:05,911 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 19:07:05,911 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 19:07:05,911 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 19:07:05,911 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 19:07:05,911 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 19:07:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 19:07:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 19:07:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 19:07:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 19:07:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 19:07:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 19:07:05,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 19:07:05,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 19:07:05,913 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 19:07:05,913 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 19:07:05,913 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 19:07:05,913 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 19:07:05,914 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 19:07:05,914 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 19:07:05,914 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 19:07:05,914 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 19:07:05,914 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 19:07:05,914 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 19:07:05,915 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 19:07:05,915 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 19:07:05,915 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 19:07:05,915 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 19:07:05,915 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 19:07:05,915 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 19:07:05,915 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 19:07:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 19:07:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 19:07:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 19:07:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 19:07:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 19:07:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 19:07:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 19:07:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 19:07:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 19:07:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 19:07:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 19:07:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 19:07:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 19:07:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 19:07:05,918 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 19:07:05,918 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 19:07:05,918 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 19:07:05,918 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 19:07:05,918 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 19:07:05,918 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 19:07:05,918 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 19:07:05,919 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 19:07:05,919 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 19:07:05,919 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 19:07:05,919 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 19:07:05,919 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 19:07:05,919 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 19:07:05,919 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 19:07:05,920 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:07:05,920 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 19:07:05,921 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 19:07:05,921 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 19:07:05,921 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 19:07:05,921 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 19:07:05,922 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 19:07:05,922 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 19:07:05,922 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 19:07:05,923 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 19:07:05,923 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 19:07:05,924 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 19:07:05,924 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 19:07:05,924 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 19:07:05,924 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 19:07:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 19:07:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 19:07:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 19:07:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 19:07:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 19:07:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 19:07:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 19:07:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 19:07:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 19:07:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 19:07:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 19:07:05,927 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 19:07:05,927 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 19:07:05,927 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 19:07:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 19:07:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 19:07:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 19:07:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 19:07:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 19:07:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 19:07:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 19:07:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 19:07:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 19:07:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 19:07:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 19:07:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 19:07:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 19:07:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 19:07:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 19:07:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-22 19:07:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-08-22 19:07:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 19:07:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 19:07:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-08-22 19:07:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 19:07:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-08-22 19:07:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:07:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:07:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:07:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:07:06,253 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-22 19:07:06,464 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:07:06,464 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 19:07:06,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:07:06 BoogieIcfgContainer [2020-08-22 19:07:06,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:07:06,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:07:06,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:07:06,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:07:06,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:07:05" (1/3) ... [2020-08-22 19:07:06,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d69d830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:07:06, skipping insertion in model container [2020-08-22 19:07:06,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:07:05" (2/3) ... [2020-08-22 19:07:06,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d69d830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:07:06, skipping insertion in model container [2020-08-22 19:07:06,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:07:06" (3/3) ... [2020-08-22 19:07:06,478 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-08-22 19:07:06,488 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:07:06,496 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:07:06,507 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:07:06,524 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:07:06,524 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:07:06,524 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:07:06,525 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:07:06,526 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:07:06,526 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:07:06,526 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:07:06,526 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:07:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-08-22 19:07:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 19:07:06,551 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:06,552 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] [2020-08-22 19:07:06,553 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:06,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:06,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1731717969, now seen corresponding path program 1 times [2020-08-22 19:07:06,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:06,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364504875] [2020-08-22 19:07:06,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:06,639 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:06,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:06,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 19:07:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:06,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 19:07:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:07:06,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364504875] [2020-08-22 19:07:06,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:06,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:07:06,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079153884] [2020-08-22 19:07:06,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:07:06,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:07:06,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:07:06,841 INFO L87 Difference]: Start difference. First operand 75 states. Second operand 4 states. [2020-08-22 19:07:07,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:07,093 INFO L93 Difference]: Finished difference Result 154 states and 184 transitions. [2020-08-22 19:07:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:07:07,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-08-22 19:07:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:07,106 INFO L225 Difference]: With dead ends: 154 [2020-08-22 19:07:07,106 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 19:07:07,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:07:07,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 19:07:07,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-08-22 19:07:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 19:07:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-08-22 19:07:07,166 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 29 [2020-08-22 19:07:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:07,166 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-08-22 19:07:07,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:07:07,167 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-08-22 19:07:07,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 19:07:07,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:07,168 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, 1, 1, 1, 1] [2020-08-22 19:07:07,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:07:07,169 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:07,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:07,169 INFO L82 PathProgramCache]: Analyzing trace with hash 632987872, now seen corresponding path program 1 times [2020-08-22 19:07:07,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:07,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552466654] [2020-08-22 19:07:07,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:07,175 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 19:07:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 19:07:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:07:07,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552466654] [2020-08-22 19:07:07,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:07,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:07:07,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444721465] [2020-08-22 19:07:07,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:07:07,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:07,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:07:07,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:07:07,314 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 6 states. [2020-08-22 19:07:07,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:07,616 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2020-08-22 19:07:07,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 19:07:07,617 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-22 19:07:07,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:07,619 INFO L225 Difference]: With dead ends: 143 [2020-08-22 19:07:07,619 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 19:07:07,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:07:07,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 19:07:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 57. [2020-08-22 19:07:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 19:07:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-08-22 19:07:07,637 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 33 [2020-08-22 19:07:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:07,637 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-08-22 19:07:07,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:07:07,638 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-08-22 19:07:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 19:07:07,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:07,641 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, 1, 1, 1, 1, 1, 1] [2020-08-22 19:07:07,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:07:07,641 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:07,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:07,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1134974621, now seen corresponding path program 1 times [2020-08-22 19:07:07,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:07,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153691305] [2020-08-22 19:07:07,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:07,647 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 19:07:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:07:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:07:07,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153691305] [2020-08-22 19:07:07,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:07,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:07:07,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359166865] [2020-08-22 19:07:07,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:07:07,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:07,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:07:07,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:07:07,823 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 7 states. [2020-08-22 19:07:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:08,199 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-08-22 19:07:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:07:08,200 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-08-22 19:07:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:08,202 INFO L225 Difference]: With dead ends: 114 [2020-08-22 19:07:08,202 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 19:07:08,203 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 [2020-08-22 19:07:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 19:07:08,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-08-22 19:07:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 19:07:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-08-22 19:07:08,221 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 35 [2020-08-22 19:07:08,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:08,224 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-08-22 19:07:08,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:07:08,225 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-08-22 19:07:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 19:07:08,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:08,230 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:07:08,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:07:08,231 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash 226602169, now seen corresponding path program 1 times [2020-08-22 19:07:08,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:08,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898288569] [2020-08-22 19:07:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:08,270 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:08,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:08,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 19:07:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:08,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 19:07:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:07:08,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898288569] [2020-08-22 19:07:08,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:08,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:07:08,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50908076] [2020-08-22 19:07:08,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:07:08,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:08,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:07:08,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:07:08,418 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 8 states. [2020-08-22 19:07:08,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:08,871 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2020-08-22 19:07:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:07:08,871 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-08-22 19:07:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:08,874 INFO L225 Difference]: With dead ends: 168 [2020-08-22 19:07:08,874 INFO L226 Difference]: Without dead ends: 117 [2020-08-22 19:07:08,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:07:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-08-22 19:07:08,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2020-08-22 19:07:08,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 19:07:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-08-22 19:07:08,894 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 43 [2020-08-22 19:07:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:08,895 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-08-22 19:07:08,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:07:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-08-22 19:07:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 19:07:08,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:08,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:07:08,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:07:08,897 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:08,898 INFO L82 PathProgramCache]: Analyzing trace with hash 360366586, now seen corresponding path program 1 times [2020-08-22 19:07:08,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:08,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273928799] [2020-08-22 19:07:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:08,908 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:08,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:08,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 19:07:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:09,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 19:07:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:07:09,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273928799] [2020-08-22 19:07:09,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:09,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:07:09,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281933427] [2020-08-22 19:07:09,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:07:09,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:09,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:07:09,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:07:09,115 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 12 states. [2020-08-22 19:07:09,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:09,617 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-08-22 19:07:09,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:07:09,618 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-08-22 19:07:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:09,621 INFO L225 Difference]: With dead ends: 101 [2020-08-22 19:07:09,622 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 19:07:09,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-08-22 19:07:09,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 19:07:09,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-08-22 19:07:09,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 19:07:09,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-08-22 19:07:09,641 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 44 [2020-08-22 19:07:09,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:09,642 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-08-22 19:07:09,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:07:09,642 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-08-22 19:07:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 19:07:09,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:09,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:07:09,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:07:09,644 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:09,644 INFO L82 PathProgramCache]: Analyzing trace with hash -829611268, now seen corresponding path program 1 times [2020-08-22 19:07:09,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:09,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385023915] [2020-08-22 19:07:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:09,652 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:09,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:09,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:07:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:09,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 19:07:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:07:09,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385023915] [2020-08-22 19:07:09,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:09,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:07:09,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796419296] [2020-08-22 19:07:09,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:07:09,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:09,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:07:09,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:07:09,753 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 9 states. [2020-08-22 19:07:10,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:10,132 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2020-08-22 19:07:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:07:10,134 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-08-22 19:07:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:10,136 INFO L225 Difference]: With dead ends: 117 [2020-08-22 19:07:10,136 INFO L226 Difference]: Without dead ends: 87 [2020-08-22 19:07:10,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:07:10,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-22 19:07:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-08-22 19:07:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 19:07:10,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-08-22 19:07:10,150 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 45 [2020-08-22 19:07:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:10,151 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-08-22 19:07:10,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:07:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-08-22 19:07:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 19:07:10,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:10,152 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:07:10,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:07:10,152 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:10,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:10,153 INFO L82 PathProgramCache]: Analyzing trace with hash -642872939, now seen corresponding path program 1 times [2020-08-22 19:07:10,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:10,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275098198] [2020-08-22 19:07:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:10,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:07:10,165 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:413) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:293) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-08-22 19:07:10,170 INFO L168 Benchmark]: Toolchain (without parser) took 5095.03 ms. Allocated memory was 139.5 MB in the beginning and 285.2 MB in the end (delta: 145.8 MB). Free memory was 102.3 MB in the beginning and 203.6 MB in the end (delta: -101.3 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:07:10,171 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 19:07:10,172 INFO L168 Benchmark]: CACSL2BoogieTranslator took 707.12 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 102.1 MB in the beginning and 168.9 MB in the end (delta: -66.8 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:07:10,173 INFO L168 Benchmark]: Boogie Preprocessor took 58.98 ms. Allocated memory is still 202.9 MB. Free memory was 168.9 MB in the beginning and 166.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:07:10,174 INFO L168 Benchmark]: RCFGBuilder took 623.90 ms. Allocated memory is still 202.9 MB. Free memory was 166.3 MB in the beginning and 120.1 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:07:10,174 INFO L168 Benchmark]: TraceAbstraction took 3697.44 ms. Allocated memory was 202.9 MB in the beginning and 285.2 MB in the end (delta: 82.3 MB). Free memory was 119.4 MB in the beginning and 203.6 MB in the end (delta: -84.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 19:07:10,178 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 707.12 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 102.1 MB in the beginning and 168.9 MB in the end (delta: -66.8 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.98 ms. Allocated memory is still 202.9 MB. Free memory was 168.9 MB in the beginning and 166.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 623.90 ms. Allocated memory is still 202.9 MB. Free memory was 166.3 MB in the beginning and 120.1 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3697.44 ms. Allocated memory was 202.9 MB in the beginning and 285.2 MB in the end (delta: 82.3 MB). Free memory was 119.4 MB in the beginning and 203.6 MB in the end (delta: -84.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:413) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...