/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_nondet_insert-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:07:03,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:07:03,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:07:03,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:07:03,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:07:03,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:07:03,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:07:03,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:07:03,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:07:03,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:07:03,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:07:03,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:07:03,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:07:03,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:07:03,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:07:03,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:07:03,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:07:03,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:07:03,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:07:03,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:07:03,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:07:03,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:07:03,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:07:03,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:07:03,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 19:07:03,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 19:07:03,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 19:07:03,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 19:07:03,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 19:07:03,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 19:07:03,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 19:07:03,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 19:07:03,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 19:07:03,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 19:07:03,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 19:07:03,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 19:07:03,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 19:07:03,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 19:07:03,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:07:03,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:07:03,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:07:03,945 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 19:07:03,959 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:07:03,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:07:03,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:07:03,961 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:07:03,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:07:03,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:07:03,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:07:03,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:07:03,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:07:03,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:07:03,964 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:07:03,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:07:03,964 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:07:03,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:07:03,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:07:03,965 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:07:03,965 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:07:03,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:07:03,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:07:03,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:07:03,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:07:03,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:07:03,967 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:07:04,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:07:04,222 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:07:04,225 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:07:04,227 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:07:04,227 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:07:04,228 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i [2020-08-22 19:07:04,284 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5cca4785/265f1d75d0664ba9a2f7e1472a77ed2b/FLAG6269419ea [2020-08-22 19:07:04,798 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:07:04,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i [2020-08-22 19:07:04,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5cca4785/265f1d75d0664ba9a2f7e1472a77ed2b/FLAG6269419ea [2020-08-22 19:07:05,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5cca4785/265f1d75d0664ba9a2f7e1472a77ed2b [2020-08-22 19:07:05,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:07:05,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:07:05,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:07:05,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:07:05,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:07:05,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:07:05" (1/1) ... [2020-08-22 19:07:05,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d1f124a 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 19:07:05,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:07:05" (1/1) ... [2020-08-22 19:07:05,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:07:05,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:07:05,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:07:05,613 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:07:05,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:07:05,730 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:07:05,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:07:05 WrapperNode [2020-08-22 19:07:05,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:07:05,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:07:05,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:07:05,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:07:05,745 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 19:07:05,746 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 19:07:05,762 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 19:07:05,763 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 19:07:05,778 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 19:07:05,784 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 19:07:05,788 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 19:07:05,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:07:05,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:07:05,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:07:05,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:07:05,797 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 19:07:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:07:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:07:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 19:07:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 19:07:05,854 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-22 19:07:05,854 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-08-22 19:07:05,854 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-08-22 19:07:05,854 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-08-22 19:07:05,854 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2020-08-22 19:07:05,854 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2020-08-22 19:07:05,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:07:05,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:07:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:07:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 19:07:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 19:07:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 19:07:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 19:07:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 19:07:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 19:07:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 19:07:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 19:07:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 19:07:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 19:07:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 19:07:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 19:07:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 19:07:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 19:07:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 19:07:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 19:07:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 19:07:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 19:07:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 19:07:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 19:07:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 19:07:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 19:07:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 19:07:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 19:07:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 19:07:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 19:07:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 19:07:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 19:07:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 19:07:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 19:07:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 19:07:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 19:07:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 19:07:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 19:07:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 19:07:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 19:07:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 19:07:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 19:07:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 19:07:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 19:07:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 19:07:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 19:07:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 19:07:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 19:07:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 19:07:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 19:07:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 19:07:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 19:07:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 19:07:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 19:07:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 19:07:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 19:07:05,868 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 19:07:05,868 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 19:07:05,868 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 19:07:05,868 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 19:07:05,868 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 19:07:05,868 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 19:07:05,868 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 19:07:05,868 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 19:07:05,869 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 19:07:05,870 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:07:05,870 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 19:07:05,870 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 19:07:05,870 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 19:07:05,870 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 19:07:05,871 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 19:07:05,871 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 19:07:05,872 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 19:07:05,872 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 19:07:05,873 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 19:07:05,873 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 19:07:05,873 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 19:07:05,873 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 19:07:05,873 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 19:07:05,874 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 19:07:05,874 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 19:07:05,874 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 19:07:05,874 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 19:07:05,874 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 19:07:05,874 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 19:07:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 19:07:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 19:07:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 19:07:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 19:07:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 19:07:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 19:07:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 19:07:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 19:07:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 19:07:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 19:07:05,877 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 19:07:05,877 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 19:07:05,877 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 19:07:05,877 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 19:07:05,877 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 19:07:05,877 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 19:07:05,877 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 19:07:05,878 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 19:07:05,878 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 19:07:05,878 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 19:07:05,878 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 19:07:05,878 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 19:07:05,878 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 19:07:05,878 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 19:07:05,879 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-22 19:07:05,879 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-08-22 19:07:05,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 19:07:05,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 19:07:05,879 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-08-22 19:07:05,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 19:07:05,880 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-08-22 19:07:05,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:07:05,880 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2020-08-22 19:07:05,880 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2020-08-22 19:07:05,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:07:05,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:07:05,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-22 19:07:05,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:07:05,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:07:06,269 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-22 19:07:06,494 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:07:06,494 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-08-22 19:07:06,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:07:06 BoogieIcfgContainer [2020-08-22 19:07:06,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:07:06,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:07:06,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:07:06,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:07:06,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:07:05" (1/3) ... [2020-08-22 19:07:06,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41dae132 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 19:07:06,505 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 19:07:06,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41dae132 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 19:07:06,506 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 19:07:06,508 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2020-08-22 19:07:06,518 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:07:06,525 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:07:06,539 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:07:06,559 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:07:06,560 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:07:06,560 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:07:06,560 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:07:06,560 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:07:06,560 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:07:06,561 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:07:06,561 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:07:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2020-08-22 19:07:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 19:07:06,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:06,595 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:07:06,595 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:06,602 INFO L82 PathProgramCache]: Analyzing trace with hash 422432984, now seen corresponding path program 1 times [2020-08-22 19:07:06,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:06,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196946335] [2020-08-22 19:07:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:06,675 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:06,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:06,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:06,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:07:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:06,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 19:07:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:06,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 19:07:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 19:07:06,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196946335] [2020-08-22 19:07:06,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:06,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:07:06,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679735484] [2020-08-22 19:07:06,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:07:06,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:06,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:07:06,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:07:06,906 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 4 states. [2020-08-22 19:07:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:07,194 INFO L93 Difference]: Finished difference Result 289 states and 337 transitions. [2020-08-22 19:07:07,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:07:07,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-08-22 19:07:07,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:07,208 INFO L225 Difference]: With dead ends: 289 [2020-08-22 19:07:07,209 INFO L226 Difference]: Without dead ends: 123 [2020-08-22 19:07:07,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 19:07:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-08-22 19:07:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2020-08-22 19:07:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 19:07:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2020-08-22 19:07:07,266 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 54 [2020-08-22 19:07:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:07,267 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2020-08-22 19:07:07,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:07:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2020-08-22 19:07:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 19:07:07,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:07,271 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:07,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:07:07,272 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash 333013349, now seen corresponding path program 1 times [2020-08-22 19:07:07,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:07,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273518869] [2020-08-22 19:07:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:07,278 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 19:07:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 19:07:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 19:07:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 19:07:07,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273518869] [2020-08-22 19:07:07,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:07,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:07:07,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792549255] [2020-08-22 19:07:07,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:07:07,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:07,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:07:07,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:07:07,532 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand 9 states. [2020-08-22 19:07:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:08,409 INFO L93 Difference]: Finished difference Result 275 states and 301 transitions. [2020-08-22 19:07:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:07:08,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-08-22 19:07:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:08,415 INFO L225 Difference]: With dead ends: 275 [2020-08-22 19:07:08,416 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 19:07:08,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2020-08-22 19:07:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 19:07:08,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2020-08-22 19:07:08,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-22 19:07:08,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2020-08-22 19:07:08,448 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 69 [2020-08-22 19:07:08,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:08,449 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2020-08-22 19:07:08,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:07:08,449 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2020-08-22 19:07:08,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 19:07:08,452 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:08,452 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:08,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:07:08,452 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:08,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:08,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1735568478, now seen corresponding path program 1 times [2020-08-22 19:07:08,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:08,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7590446] [2020-08-22 19:07:08,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:08,458 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:08,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:08,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:08,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:07:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:08,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 19:07:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:08,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 19:07:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:08,668 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 19:07:08,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7590446] [2020-08-22 19:07:08,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:08,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:07:08,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126101835] [2020-08-22 19:07:08,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:07:08,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:08,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:07:08,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:07:08,670 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand 12 states. [2020-08-22 19:07:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:09,660 INFO L93 Difference]: Finished difference Result 313 states and 348 transitions. [2020-08-22 19:07:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 19:07:09,661 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-08-22 19:07:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:09,664 INFO L225 Difference]: With dead ends: 313 [2020-08-22 19:07:09,670 INFO L226 Difference]: Without dead ends: 206 [2020-08-22 19:07:09,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2020-08-22 19:07:09,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-22 19:07:09,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 154. [2020-08-22 19:07:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-08-22 19:07:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 167 transitions. [2020-08-22 19:07:09,743 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 167 transitions. Word has length 71 [2020-08-22 19:07:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:09,746 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 167 transitions. [2020-08-22 19:07:09,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:07:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 167 transitions. [2020-08-22 19:07:09,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 19:07:09,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:09,759 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:09,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:07:09,759 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:09,760 INFO L82 PathProgramCache]: Analyzing trace with hash -472966004, now seen corresponding path program 1 times [2020-08-22 19:07:09,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:09,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033747924] [2020-08-22 19:07:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:09,771 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:09,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:09,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:10,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 19:07:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:10,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 19:07:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:10,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 19:07:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:10,103 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 19:07:10,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033747924] [2020-08-22 19:07:10,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:10,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:07:10,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014136864] [2020-08-22 19:07:10,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:07:10,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:10,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:07:10,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:07:10,105 INFO L87 Difference]: Start difference. First operand 154 states and 167 transitions. Second operand 11 states. [2020-08-22 19:07:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:11,622 INFO L93 Difference]: Finished difference Result 342 states and 375 transitions. [2020-08-22 19:07:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 19:07:11,622 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-08-22 19:07:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:11,624 INFO L225 Difference]: With dead ends: 342 [2020-08-22 19:07:11,625 INFO L226 Difference]: Without dead ends: 204 [2020-08-22 19:07:11,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2020-08-22 19:07:11,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-08-22 19:07:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 161. [2020-08-22 19:07:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-22 19:07:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 174 transitions. [2020-08-22 19:07:11,652 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 174 transitions. Word has length 79 [2020-08-22 19:07:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:11,653 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 174 transitions. [2020-08-22 19:07:11,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:07:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 174 transitions. [2020-08-22 19:07:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 19:07:11,655 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:11,655 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:11,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:07:11,656 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:11,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1820928426, now seen corresponding path program 1 times [2020-08-22 19:07:11,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:11,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144093323] [2020-08-22 19:07:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:11,661 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:11,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:11,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:11,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:07:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:11,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 19:07:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:11,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 19:07:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:11,850 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 19:07:11,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144093323] [2020-08-22 19:07:11,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:11,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:07:11,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344535106] [2020-08-22 19:07:11,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:07:11,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:11,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:07:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:07:11,853 INFO L87 Difference]: Start difference. First operand 161 states and 174 transitions. Second operand 14 states. [2020-08-22 19:07:12,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:12,927 INFO L93 Difference]: Finished difference Result 307 states and 339 transitions. [2020-08-22 19:07:12,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 19:07:12,928 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-22 19:07:12,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:12,930 INFO L225 Difference]: With dead ends: 307 [2020-08-22 19:07:12,931 INFO L226 Difference]: Without dead ends: 221 [2020-08-22 19:07:12,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2020-08-22 19:07:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-08-22 19:07:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 170. [2020-08-22 19:07:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-08-22 19:07:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 184 transitions. [2020-08-22 19:07:12,964 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 184 transitions. Word has length 80 [2020-08-22 19:07:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:12,965 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 184 transitions. [2020-08-22 19:07:12,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:07:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 184 transitions. [2020-08-22 19:07:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 19:07:12,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:12,967 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:12,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:07:12,967 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:12,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:12,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1107353865, now seen corresponding path program 2 times [2020-08-22 19:07:12,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:12,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405925024] [2020-08-22 19:07:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:12,971 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:13,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:13,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:13,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 19:07:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:13,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 19:07:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:13,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 19:07:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:13,166 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 19:07:13,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405925024] [2020-08-22 19:07:13,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:13,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:07:13,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417414797] [2020-08-22 19:07:13,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:07:13,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:13,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:07:13,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:07:13,168 INFO L87 Difference]: Start difference. First operand 170 states and 184 transitions. Second operand 14 states. [2020-08-22 19:07:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:14,476 INFO L93 Difference]: Finished difference Result 306 states and 337 transitions. [2020-08-22 19:07:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 19:07:14,476 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-22 19:07:14,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:14,479 INFO L225 Difference]: With dead ends: 306 [2020-08-22 19:07:14,481 INFO L226 Difference]: Without dead ends: 216 [2020-08-22 19:07:14,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2020-08-22 19:07:14,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-22 19:07:14,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2020-08-22 19:07:14,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-08-22 19:07:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 183 transitions. [2020-08-22 19:07:14,511 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 183 transitions. Word has length 81 [2020-08-22 19:07:14,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:14,512 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 183 transitions. [2020-08-22 19:07:14,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:07:14,512 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 183 transitions. [2020-08-22 19:07:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 19:07:14,514 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:14,515 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:14,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:07:14,515 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:14,515 INFO L82 PathProgramCache]: Analyzing trace with hash -574415326, now seen corresponding path program 2 times [2020-08-22 19:07:14,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:14,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759638030] [2020-08-22 19:07:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:14,520 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:14,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:14,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:14,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:07:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:14,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 19:07:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:14,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 19:07:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:14,707 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 19:07:14,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759638030] [2020-08-22 19:07:14,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:14,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 19:07:14,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925099753] [2020-08-22 19:07:14,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 19:07:14,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:14,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 19:07:14,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:07:14,710 INFO L87 Difference]: Start difference. First operand 170 states and 183 transitions. Second operand 13 states. [2020-08-22 19:07:15,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:15,389 INFO L93 Difference]: Finished difference Result 207 states and 225 transitions. [2020-08-22 19:07:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 19:07:15,390 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-08-22 19:07:15,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:15,392 INFO L225 Difference]: With dead ends: 207 [2020-08-22 19:07:15,392 INFO L226 Difference]: Without dead ends: 201 [2020-08-22 19:07:15,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-08-22 19:07:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-08-22 19:07:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2020-08-22 19:07:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-08-22 19:07:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 200 transitions. [2020-08-22 19:07:15,415 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 200 transitions. Word has length 89 [2020-08-22 19:07:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:15,415 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 200 transitions. [2020-08-22 19:07:15,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 19:07:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 200 transitions. [2020-08-22 19:07:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 19:07:15,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:15,417 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:15,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:07:15,417 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:15,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:15,418 INFO L82 PathProgramCache]: Analyzing trace with hash 263120297, now seen corresponding path program 1 times [2020-08-22 19:07:15,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:15,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160710134] [2020-08-22 19:07:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:15,449 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:15,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:15,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:15,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:07:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:15,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 19:07:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:15,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 19:07:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:15,755 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 19:07:15,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160710134] [2020-08-22 19:07:15,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:15,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 19:07:15,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927290313] [2020-08-22 19:07:15,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 19:07:15,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:15,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 19:07:15,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-08-22 19:07:15,757 INFO L87 Difference]: Start difference. First operand 183 states and 200 transitions. Second operand 18 states. [2020-08-22 19:07:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:16,985 INFO L93 Difference]: Finished difference Result 239 states and 263 transitions. [2020-08-22 19:07:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 19:07:16,988 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2020-08-22 19:07:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:16,990 INFO L225 Difference]: With dead ends: 239 [2020-08-22 19:07:16,990 INFO L226 Difference]: Without dead ends: 233 [2020-08-22 19:07:16,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 19:07:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-08-22 19:07:17,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 209. [2020-08-22 19:07:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-22 19:07:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 232 transitions. [2020-08-22 19:07:17,020 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 232 transitions. Word has length 96 [2020-08-22 19:07:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:17,021 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 232 transitions. [2020-08-22 19:07:17,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 19:07:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 232 transitions. [2020-08-22 19:07:17,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 19:07:17,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:17,023 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:17,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:07:17,023 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:17,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:17,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1940597340, now seen corresponding path program 1 times [2020-08-22 19:07:17,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:17,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189687479] [2020-08-22 19:07:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:17,035 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:17,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:17,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:17,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 19:07:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:17,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 19:07:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:17,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 19:07:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:17,270 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 19:07:17,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189687479] [2020-08-22 19:07:17,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:17,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 19:07:17,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260460922] [2020-08-22 19:07:17,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 19:07:17,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:17,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 19:07:17,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:07:17,273 INFO L87 Difference]: Start difference. First operand 209 states and 232 transitions. Second operand 16 states. [2020-08-22 19:07:18,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:18,732 INFO L93 Difference]: Finished difference Result 358 states and 404 transitions. [2020-08-22 19:07:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 19:07:18,733 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-08-22 19:07:18,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:18,736 INFO L225 Difference]: With dead ends: 358 [2020-08-22 19:07:18,736 INFO L226 Difference]: Without dead ends: 245 [2020-08-22 19:07:18,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 19:07:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-08-22 19:07:18,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 176. [2020-08-22 19:07:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-22 19:07:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 192 transitions. [2020-08-22 19:07:18,769 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 192 transitions. Word has length 97 [2020-08-22 19:07:18,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:18,769 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 192 transitions. [2020-08-22 19:07:18,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 19:07:18,769 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 192 transitions. [2020-08-22 19:07:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 19:07:18,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:18,771 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:18,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:07:18,771 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:18,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:18,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1056708542, now seen corresponding path program 2 times [2020-08-22 19:07:18,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:18,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801641698] [2020-08-22 19:07:18,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:18,777 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:18,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:18,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:18,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:07:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:18,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 19:07:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:18,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 19:07:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:19,005 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 19:07:19,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801641698] [2020-08-22 19:07:19,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:19,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 19:07:19,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881582798] [2020-08-22 19:07:19,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 19:07:19,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:19,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 19:07:19,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:07:19,009 INFO L87 Difference]: Start difference. First operand 176 states and 192 transitions. Second operand 13 states. [2020-08-22 19:07:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:20,102 INFO L93 Difference]: Finished difference Result 369 states and 420 transitions. [2020-08-22 19:07:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 19:07:20,103 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 103 [2020-08-22 19:07:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:20,105 INFO L225 Difference]: With dead ends: 369 [2020-08-22 19:07:20,105 INFO L226 Difference]: Without dead ends: 266 [2020-08-22 19:07:20,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2020-08-22 19:07:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-22 19:07:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 206. [2020-08-22 19:07:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-22 19:07:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 228 transitions. [2020-08-22 19:07:20,137 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 228 transitions. Word has length 103 [2020-08-22 19:07:20,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:20,137 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 228 transitions. [2020-08-22 19:07:20,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 19:07:20,137 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 228 transitions. [2020-08-22 19:07:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-22 19:07:20,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:20,139 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:20,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:07:20,139 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:20,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2144765375, now seen corresponding path program 1 times [2020-08-22 19:07:20,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:20,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377642471] [2020-08-22 19:07:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:20,151 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:20,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:20,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:20,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:07:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:20,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 19:07:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:20,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 19:07:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:20,581 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 19:07:20,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377642471] [2020-08-22 19:07:20,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:20,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 19:07:20,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927367893] [2020-08-22 19:07:20,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 19:07:20,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:20,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 19:07:20,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:07:20,584 INFO L87 Difference]: Start difference. First operand 206 states and 228 transitions. Second operand 20 states. [2020-08-22 19:07:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:22,368 INFO L93 Difference]: Finished difference Result 325 states and 381 transitions. [2020-08-22 19:07:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 19:07:22,369 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2020-08-22 19:07:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:22,376 INFO L225 Difference]: With dead ends: 325 [2020-08-22 19:07:22,376 INFO L226 Difference]: Without dead ends: 319 [2020-08-22 19:07:22,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 19:07:22,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-08-22 19:07:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 256. [2020-08-22 19:07:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 19:07:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 294 transitions. [2020-08-22 19:07:22,423 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 294 transitions. Word has length 105 [2020-08-22 19:07:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:22,423 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 294 transitions. [2020-08-22 19:07:22,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 19:07:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 294 transitions. [2020-08-22 19:07:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 19:07:22,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:22,426 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:22,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 19:07:22,426 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:22,427 INFO L82 PathProgramCache]: Analyzing trace with hash -798874772, now seen corresponding path program 2 times [2020-08-22 19:07:22,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:22,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352352971] [2020-08-22 19:07:22,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:22,436 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:22,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:22,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:22,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:07:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:22,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 19:07:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:22,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 19:07:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:23,068 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 19:07:23,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352352971] [2020-08-22 19:07:23,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:23,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-08-22 19:07:23,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192450232] [2020-08-22 19:07:23,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 19:07:23,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:23,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 19:07:23,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-08-22 19:07:23,070 INFO L87 Difference]: Start difference. First operand 256 states and 294 transitions. Second operand 23 states. [2020-08-22 19:07:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:25,219 INFO L93 Difference]: Finished difference Result 340 states and 399 transitions. [2020-08-22 19:07:25,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 19:07:25,220 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-08-22 19:07:25,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:25,223 INFO L225 Difference]: With dead ends: 340 [2020-08-22 19:07:25,223 INFO L226 Difference]: Without dead ends: 330 [2020-08-22 19:07:25,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=172, Invalid=1720, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 19:07:25,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-22 19:07:25,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 297. [2020-08-22 19:07:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-08-22 19:07:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 346 transitions. [2020-08-22 19:07:25,264 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 346 transitions. Word has length 112 [2020-08-22 19:07:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:25,265 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 346 transitions. [2020-08-22 19:07:25,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 19:07:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 346 transitions. [2020-08-22 19:07:25,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 19:07:25,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:25,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:25,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 19:07:25,268 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:25,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:25,268 INFO L82 PathProgramCache]: Analyzing trace with hash -861453783, now seen corresponding path program 2 times [2020-08-22 19:07:25,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:25,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306279054] [2020-08-22 19:07:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:25,275 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:25,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:25,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:25,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:07:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:25,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 19:07:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:25,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 19:07:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:25,535 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 19:07:25,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306279054] [2020-08-22 19:07:25,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:25,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 19:07:25,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222348957] [2020-08-22 19:07:25,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 19:07:25,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:25,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 19:07:25,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:07:25,539 INFO L87 Difference]: Start difference. First operand 297 states and 346 transitions. Second operand 15 states. [2020-08-22 19:07:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:26,965 INFO L93 Difference]: Finished difference Result 542 states and 648 transitions. [2020-08-22 19:07:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 19:07:26,966 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 113 [2020-08-22 19:07:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:26,969 INFO L225 Difference]: With dead ends: 542 [2020-08-22 19:07:26,969 INFO L226 Difference]: Without dead ends: 407 [2020-08-22 19:07:26,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 19:07:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-08-22 19:07:27,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 321. [2020-08-22 19:07:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-08-22 19:07:27,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 380 transitions. [2020-08-22 19:07:27,023 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 380 transitions. Word has length 113 [2020-08-22 19:07:27,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:27,024 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 380 transitions. [2020-08-22 19:07:27,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 19:07:27,024 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 380 transitions. [2020-08-22 19:07:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 19:07:27,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:27,026 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:27,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 19:07:27,027 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:27,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:27,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1389369769, now seen corresponding path program 3 times [2020-08-22 19:07:27,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:27,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259279807] [2020-08-22 19:07:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:27,034 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:27,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:07:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:27,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:07:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:27,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 19:07:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:27,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 19:07:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:27,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 19:07:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:07:27,352 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 19:07:27,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259279807] [2020-08-22 19:07:27,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:07:27,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 19:07:27,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488711540] [2020-08-22 19:07:27,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 19:07:27,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:07:27,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 19:07:27,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-08-22 19:07:27,356 INFO L87 Difference]: Start difference. First operand 321 states and 380 transitions. Second operand 18 states. [2020-08-22 19:07:29,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:07:29,058 INFO L93 Difference]: Finished difference Result 536 states and 631 transitions. [2020-08-22 19:07:29,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 19:07:29,059 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 113 [2020-08-22 19:07:29,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:29,062 INFO L225 Difference]: With dead ends: 536 [2020-08-22 19:07:29,062 INFO L226 Difference]: Without dead ends: 377 [2020-08-22 19:07:29,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 19:07:29,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-08-22 19:07:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 318. [2020-08-22 19:07:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-08-22 19:07:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 371 transitions. [2020-08-22 19:07:29,135 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 371 transitions. Word has length 113 [2020-08-22 19:07:29,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:29,135 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 371 transitions. [2020-08-22 19:07:29,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 19:07:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 371 transitions. [2020-08-22 19:07:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 19:07:29,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:29,138 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:29,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 19:07:29,138 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2144590086, now seen corresponding path program 1 times [2020-08-22 19:07:29,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:29,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675898795] [2020-08-22 19:07:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:29,146 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:07:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:07:29,160 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:07:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:07:29,181 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:07:29,238 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 19:07:29,238 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:07:29,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 19:07:29,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:07:29 BoogieIcfgContainer [2020-08-22 19:07:29,271 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:07:29,274 INFO L168 Benchmark]: Toolchain (without parser) took 24169.13 ms. Allocated memory was 140.0 MB in the beginning and 476.6 MB in the end (delta: 336.6 MB). Free memory was 101.8 MB in the beginning and 414.5 MB in the end (delta: -312.7 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:07:29,275 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:07:29,276 INFO L168 Benchmark]: CACSL2BoogieTranslator took 626.00 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 101.6 MB in the beginning and 170.2 MB in the end (delta: -68.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-08-22 19:07:29,286 INFO L168 Benchmark]: Boogie Preprocessor took 63.46 ms. Allocated memory is still 204.5 MB. Free memory was 170.2 MB in the beginning and 167.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:07:29,287 INFO L168 Benchmark]: RCFGBuilder took 703.93 ms. Allocated memory is still 204.5 MB. Free memory was 166.7 MB in the beginning and 109.6 MB in the end (delta: 57.0 MB). Peak memory consumption was 57.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:07:29,288 INFO L168 Benchmark]: TraceAbstraction took 22770.53 ms. Allocated memory was 204.5 MB in the beginning and 476.6 MB in the end (delta: 272.1 MB). Free memory was 109.0 MB in the beginning and 414.5 MB in the end (delta: -305.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 19:07:29,294 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 626.00 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 101.6 MB in the beginning and 170.2 MB in the end (delta: -68.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.46 ms. Allocated memory is still 204.5 MB. Free memory was 170.2 MB in the beginning and 167.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 703.93 ms. Allocated memory is still 204.5 MB. Free memory was 166.7 MB in the beginning and 109.6 MB in the end (delta: 57.0 MB). Peak memory consumption was 57.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22770.53 ms. Allocated memory was 204.5 MB in the beginning and 476.6 MB in the end (delta: 272.1 MB). Free memory was 109.0 MB in the beginning and 414.5 MB in the end (delta: -305.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 630]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L616] CALL, EXPR _get_nondet_int(2, 5) [L609] int len = from; [L610] len < until && __VERIFIER_nondet_int() [L610] len < until && __VERIFIER_nondet_int() [L610] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L613] return len; [L616] RET, EXPR _get_nondet_int(2, 5) [L616] const int len = _get_nondet_int(2, 5); [L617] SLL s = sll_create(len); [L617] CALL, EXPR sll_create(len) [L564] SLL head = ((void *)0); [L565] EXPR len-- [L565] COND TRUE len-- > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L565] EXPR len-- [L565] COND TRUE len-- > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L565] EXPR len-- [L565] COND FALSE !(len-- > 0) [L573] return head; [L617] RET, EXPR sll_create(len) [L617] SLL s = sll_create(len); [L618] CALL, EXPR _get_nondet_int(0, len - 1) [L609] int len = from; [L610] len < until && __VERIFIER_nondet_int() [L610] len < until && __VERIFIER_nondet_int() [L610] COND TRUE len < until && __VERIFIER_nondet_int() [L611] len++ [L610] len < until && __VERIFIER_nondet_int() [L610] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L613] return len; [L618] RET, EXPR _get_nondet_int(0, len - 1) [L618] const int k = _get_nondet_int(0, len - 1); [L619] int i = 0; [L620] i < k && __VERIFIER_nondet_int() [L620] i < k && __VERIFIER_nondet_int() [L620] COND FALSE !(i < k && __VERIFIER_nondet_int()) [L625] EXPR \read(s) [L625] CALL, EXPR sll_length(s) [L576] int len = 0; [L577] COND TRUE \read(head) [L578] len++ [L579] EXPR head->next [L579] head = head->next [L577] COND TRUE \read(head) [L578] len++ [L579] EXPR head->next [L579] head = head->next [L577] COND FALSE !(\read(head)) [L581] return len; [L625] RET, EXPR sll_length(s) [L625] COND TRUE k + len != sll_length(s) [L630] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 153 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22.6s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 17.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1930 SDtfs, 4097 SDslu, 11477 SDs, 0 SdLazy, 12874 SolverSat, 560 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 589 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=321occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 14 MinimizatonAttempts, 648 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...