java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-simple/sll2c_remove_all.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:02:39,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:02:39,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:02:39,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:02:39,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:02:39,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:02:39,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:02:39,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:02:39,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:02:39,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:02:39,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:02:39,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:02:39,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:02:39,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:02:39,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:02:39,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:02:39,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:02:39,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:02:39,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:02:39,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:02:39,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:02:39,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:02:39,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:02:39,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:02:39,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:02:39,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:02:39,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:02:39,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:02:39,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:02:39,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:02:39,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:02:39,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:02:39,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:02:39,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:02:39,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:02:39,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:02:39,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:02:39,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:02:39,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:02:39,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:02:39,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:02:39,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 13:02:39,332 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:02:39,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:02:39,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 13:02:39,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 13:02:39,336 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 13:02:39,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:02:39,336 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:02:39,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 13:02:39,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:02:39,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:02:39,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:02:39,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:02:39,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:02:39,340 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:02:39,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:02:39,340 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 13:02:39,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:02:39,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:02:39,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:02:39,344 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 13:02:39,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 13:02:39,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:02:39,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:02:39,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:02:39,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 13:02:39,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 13:02:39,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:02:39,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 13:02:39,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:02:39,384 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:02:39,397 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:02:39,400 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:02:39,401 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:02:39,402 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:02:39,402 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2c_remove_all.i [2019-09-20 13:02:39,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63c59d324/b94cd6b5224640019018c14ad5c6015f/FLAG119676e69 [2019-09-20 13:02:39,933 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:02:39,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all.i [2019-09-20 13:02:39,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63c59d324/b94cd6b5224640019018c14ad5c6015f/FLAG119676e69 [2019-09-20 13:02:40,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63c59d324/b94cd6b5224640019018c14ad5c6015f [2019-09-20 13:02:40,230 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:02:40,233 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:02:40,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:02:40,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:02:40,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:02:40,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:02:40" (1/1) ... [2019-09-20 13:02:40,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a769d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:40, skipping insertion in model container [2019-09-20 13:02:40,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:02:40" (1/1) ... [2019-09-20 13:02:40,248 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:02:40,298 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:02:40,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:02:40,797 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:02:40,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:02:40,927 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:02:40,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:40 WrapperNode [2019-09-20 13:02:40,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:02:40,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:02:40,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:02:40,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:02:40,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:40" (1/1) ... [2019-09-20 13:02:40,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:40" (1/1) ... [2019-09-20 13:02:40,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:40" (1/1) ... [2019-09-20 13:02:40,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:40" (1/1) ... [2019-09-20 13:02:40,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:40" (1/1) ... [2019-09-20 13:02:40,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:40" (1/1) ... [2019-09-20 13:02:40,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:40" (1/1) ... [2019-09-20 13:02:41,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:02:41,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:02:41,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:02:41,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:02:41,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:40" (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 [2019-09-20 13:02:41,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:02:41,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:02:41,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-09-20 13:02:41,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-09-20 13:02:41,064 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-09-20 13:02:41,064 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-09-20 13:02:41,064 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2019-09-20 13:02:41,065 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_remove_first [2019-09-20 13:02:41,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:02:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:02:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-09-20 13:02:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-09-20 13:02:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-09-20 13:02:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-09-20 13:02:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-09-20 13:02:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-09-20 13:02:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-09-20 13:02:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-09-20 13:02:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-09-20 13:02:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-09-20 13:02:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-09-20 13:02:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-09-20 13:02:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-09-20 13:02:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-09-20 13:02:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-09-20 13:02:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-09-20 13:02:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-09-20 13:02:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-09-20 13:02:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-09-20 13:02:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-09-20 13:02:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-09-20 13:02:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-09-20 13:02:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-09-20 13:02:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-09-20 13:02:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-09-20 13:02:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-09-20 13:02:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-09-20 13:02:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-09-20 13:02:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-09-20 13:02:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-09-20 13:02:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-09-20 13:02:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-09-20 13:02:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-09-20 13:02:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-09-20 13:02:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-09-20 13:02:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-09-20 13:02:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-09-20 13:02:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-09-20 13:02:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-09-20 13:02:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-09-20 13:02:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-09-20 13:02:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-09-20 13:02:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-09-20 13:02:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-09-20 13:02:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-09-20 13:02:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-09-20 13:02:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-09-20 13:02:41,073 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-09-20 13:02:41,073 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-09-20 13:02:41,073 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-09-20 13:02:41,073 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-09-20 13:02:41,073 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-09-20 13:02:41,073 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-20 13:02:41,073 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-09-20 13:02:41,074 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-09-20 13:02:41,074 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-20 13:02:41,074 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-09-20 13:02:41,074 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-09-20 13:02:41,074 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-09-20 13:02:41,074 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-09-20 13:02:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-09-20 13:02:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-09-20 13:02:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-09-20 13:02:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-09-20 13:02:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-09-20 13:02:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-20 13:02:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-09-20 13:02:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-09-20 13:02:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-09-20 13:02:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-09-20 13:02:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-09-20 13:02:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-09-20 13:02:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-09-20 13:02:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-09-20 13:02:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-09-20 13:02:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-09-20 13:02:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-09-20 13:02:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-09-20 13:02:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-09-20 13:02:41,078 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-09-20 13:02:41,078 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-09-20 13:02:41,078 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-09-20 13:02:41,078 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-09-20 13:02:41,078 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-09-20 13:02:41,078 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-09-20 13:02:41,078 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-09-20 13:02:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-09-20 13:02:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-09-20 13:02:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-09-20 13:02:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-09-20 13:02:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-09-20 13:02:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-09-20 13:02:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-09-20 13:02:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-09-20 13:02:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-09-20 13:02:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-09-20 13:02:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-09-20 13:02:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-09-20 13:02:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-09-20 13:02:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-09-20 13:02:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-09-20 13:02:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-09-20 13:02:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-09-20 13:02:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-09-20 13:02:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-09-20 13:02:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-09-20 13:02:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-09-20 13:02:41,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-20 13:02:41,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-20 13:02:41,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:02:41,082 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2019-09-20 13:02:41,082 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_remove_first [2019-09-20 13:02:41,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-20 13:02:41,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:02:41,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:02:41,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:02:41,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-09-20 13:02:41,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:02:41,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:02:41,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:02:41,413 INFO L683 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-09-20 13:02:41,639 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:02:41,640 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-20 13:02:41,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:02:41 BoogieIcfgContainer [2019-09-20 13:02:41,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:02:41,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:02:41,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:02:41,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:02:41,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:02:40" (1/3) ... [2019-09-20 13:02:41,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d64ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:02:41, skipping insertion in model container [2019-09-20 13:02:41,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:40" (2/3) ... [2019-09-20 13:02:41,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d64ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:02:41, skipping insertion in model container [2019-09-20 13:02:41,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:02:41" (3/3) ... [2019-09-20 13:02:41,650 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2019-09-20 13:02:41,660 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:02:41,668 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:02:41,683 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:02:41,710 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 13:02:41,711 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:02:41,711 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 13:02:41,711 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:02:41,711 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:02:41,711 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:02:41,711 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:02:41,712 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:02:41,712 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:02:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2019-09-20 13:02:41,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-20 13:02:41,735 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:41,736 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:02:41,739 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:41,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:41,745 INFO L82 PathProgramCache]: Analyzing trace with hash 430323869, now seen corresponding path program 1 times [2019-09-20 13:02:41,747 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:41,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:41,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:41,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:41,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:02:41,950 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:02:41,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:02:41,954 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:02:41,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:02:41,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:02:41,974 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2019-09-20 13:02:42,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:02:42,001 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2019-09-20 13:02:42,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:02:42,002 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2019-09-20 13:02:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:02:42,010 INFO L225 Difference]: With dead ends: 65 [2019-09-20 13:02:42,010 INFO L226 Difference]: Without dead ends: 36 [2019-09-20 13:02:42,013 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:02:42,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-20 13:02:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-20 13:02:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-20 13:02:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-09-20 13:02:42,062 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2019-09-20 13:02:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:02:42,064 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-09-20 13:02:42,064 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:02:42,064 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-09-20 13:02:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-20 13:02:42,066 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:42,067 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:02:42,067 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:42,068 INFO L82 PathProgramCache]: Analyzing trace with hash 430145123, now seen corresponding path program 1 times [2019-09-20 13:02:42,068 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:42,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:42,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:42,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:42,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:02:42,200 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:02:42,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:02:42,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:02:42,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:02:42,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:02:42,203 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 5 states. [2019-09-20 13:02:42,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:02:42,290 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2019-09-20 13:02:42,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 13:02:42,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-09-20 13:02:42,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:02:42,292 INFO L225 Difference]: With dead ends: 57 [2019-09-20 13:02:42,292 INFO L226 Difference]: Without dead ends: 39 [2019-09-20 13:02:42,294 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:02:42,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-20 13:02:42,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-20 13:02:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-20 13:02:42,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-09-20 13:02:42,304 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 24 [2019-09-20 13:02:42,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:02:42,304 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-09-20 13:02:42,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:02:42,305 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-09-20 13:02:42,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-20 13:02:42,306 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:42,306 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:02:42,306 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:42,307 INFO L82 PathProgramCache]: Analyzing trace with hash -452541733, now seen corresponding path program 1 times [2019-09-20 13:02:42,307 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:42,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:42,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:42,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:42,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-20 13:02:42,425 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:02:42,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:02:42,426 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:02:42,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:02:42,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:02:42,428 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2019-09-20 13:02:42,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:02:42,472 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2019-09-20 13:02:42,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:02:42,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-09-20 13:02:42,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:02:42,475 INFO L225 Difference]: With dead ends: 44 [2019-09-20 13:02:42,476 INFO L226 Difference]: Without dead ends: 40 [2019-09-20 13:02:42,477 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:02:42,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-20 13:02:42,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2019-09-20 13:02:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-20 13:02:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-09-20 13:02:42,490 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 32 [2019-09-20 13:02:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:02:42,493 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-09-20 13:02:42,493 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:02:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-09-20 13:02:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-20 13:02:42,495 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:42,495 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:02:42,495 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:42,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1201021362, now seen corresponding path program 1 times [2019-09-20 13:02:42,497 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:42,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:42,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:42,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:42,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-20 13:02:42,671 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:02:42,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:02:42,671 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:02:42,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:02:42,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:02:42,672 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 6 states. [2019-09-20 13:02:42,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:02:42,827 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2019-09-20 13:02:42,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:02:42,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2019-09-20 13:02:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:02:42,831 INFO L225 Difference]: With dead ends: 52 [2019-09-20 13:02:42,831 INFO L226 Difference]: Without dead ends: 48 [2019-09-20 13:02:42,832 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:02:42,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-20 13:02:42,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2019-09-20 13:02:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-20 13:02:42,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-09-20 13:02:42,840 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 39 [2019-09-20 13:02:42,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:02:42,840 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-09-20 13:02:42,841 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:02:42,841 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-09-20 13:02:42,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-20 13:02:42,842 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:42,842 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:02:42,842 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:42,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:42,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1388528326, now seen corresponding path program 1 times [2019-09-20 13:02:42,843 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:42,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:42,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:42,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:42,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-20 13:02:43,137 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:02:43,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:02:43,138 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:02:43,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:02:43,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:02:43,139 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2019-09-20 13:02:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:02:43,271 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2019-09-20 13:02:43,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 13:02:43,272 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-09-20 13:02:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:02:43,273 INFO L225 Difference]: With dead ends: 61 [2019-09-20 13:02:43,274 INFO L226 Difference]: Without dead ends: 43 [2019-09-20 13:02:43,276 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:02:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-20 13:02:43,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-20 13:02:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-20 13:02:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-09-20 13:02:43,287 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 42 [2019-09-20 13:02:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:02:43,287 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-09-20 13:02:43,288 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:02:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-09-20 13:02:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-20 13:02:43,294 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:43,295 INFO L407 BasicCegarLoop]: trace histogram [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] [2019-09-20 13:02:43,295 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:43,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:43,295 INFO L82 PathProgramCache]: Analyzing trace with hash -89881461, now seen corresponding path program 1 times [2019-09-20 13:02:43,295 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:43,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:43,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:43,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:43,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-20 13:02:43,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:02:43,423 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:02:43,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:43,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 13:02:43,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:02:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-20 13:02:43,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:02:43,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-09-20 13:02:43,689 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:02:43,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:02:43,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:02:43,690 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 7 states. [2019-09-20 13:02:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:02:43,751 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2019-09-20 13:02:43,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:02:43,752 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2019-09-20 13:02:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:02:43,753 INFO L225 Difference]: With dead ends: 56 [2019-09-20 13:02:43,753 INFO L226 Difference]: Without dead ends: 52 [2019-09-20 13:02:43,754 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:02:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-20 13:02:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2019-09-20 13:02:43,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-20 13:02:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2019-09-20 13:02:43,761 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 44 [2019-09-20 13:02:43,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:02:43,762 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2019-09-20 13:02:43,762 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:02:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2019-09-20 13:02:43,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-20 13:02:43,763 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:43,763 INFO L407 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] [2019-09-20 13:02:43,764 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:43,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:43,764 INFO L82 PathProgramCache]: Analyzing trace with hash -938275970, now seen corresponding path program 1 times [2019-09-20 13:02:43,764 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:43,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:43,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:43,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:43,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:02:44,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:02:44,092 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:02:44,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:44,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 61 conjunts are in the unsatisfiable core [2019-09-20 13:02:44,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:02:44,316 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-09-20 13:02:44,319 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:02:44,323 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:02:44,324 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:02:44,324 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-09-20 13:02:44,360 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:02:44,360 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-09-20 13:02:44,361 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:02:44,366 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:02:44,367 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:02:44,367 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:8 [2019-09-20 13:02:44,375 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-09-20 13:02:44,376 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:02:44,382 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:02:44,382 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:02:44,383 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2019-09-20 13:02:44,445 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:02:44,446 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 46 [2019-09-20 13:02:44,448 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:02:44,452 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:02:44,457 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:02:44,458 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-20 13:02:44,458 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2019-09-20 13:02:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:02:44,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:02:44,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 23 [2019-09-20 13:02:44,699 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-20 13:02:44,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-20 13:02:44,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2019-09-20 13:02:44,700 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 23 states. [2019-09-20 13:02:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:02:45,328 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2019-09-20 13:02:45,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-20 13:02:45,329 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2019-09-20 13:02:45,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:02:45,330 INFO L225 Difference]: With dead ends: 75 [2019-09-20 13:02:45,330 INFO L226 Difference]: Without dead ends: 55 [2019-09-20 13:02:45,331 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2019-09-20 13:02:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-20 13:02:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-09-20 13:02:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-20 13:02:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2019-09-20 13:02:45,340 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 51 [2019-09-20 13:02:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:02:45,341 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2019-09-20 13:02:45,341 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-20 13:02:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2019-09-20 13:02:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-20 13:02:45,343 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:45,343 INFO L407 BasicCegarLoop]: trace histogram [4, 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] [2019-09-20 13:02:45,344 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:45,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1321025083, now seen corresponding path program 2 times [2019-09-20 13:02:45,344 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:45,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:45,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:45,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:45,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:45,976 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2019-09-20 13:02:46,594 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2019-09-20 13:02:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 13:02:46,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:02:46,768 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:02:46,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 13:02:46,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 13:02:46,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:02:46,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 54 conjunts are in the unsatisfiable core [2019-09-20 13:02:46,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:02:47,193 INFO L341 Elim1Store]: treesize reduction 106, result has 24.8 percent of original size [2019-09-20 13:02:47,194 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 271 treesize of output 142 [2019-09-20 13:02:47,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:02:47,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:02:47,199 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-20 13:02:47,226 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:02:47,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:02:47,429 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:461) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-09-20 13:02:47,433 INFO L168 Benchmark]: Toolchain (without parser) took 7201.74 ms. Allocated memory was 132.6 MB in the beginning and 320.3 MB in the end (delta: 187.7 MB). Free memory was 86.9 MB in the beginning and 81.3 MB in the end (delta: 5.6 MB). Peak memory consumption was 193.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:02:47,434 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 132.6 MB. Free memory was 106.7 MB in the beginning and 106.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:02:47,435 INFO L168 Benchmark]: CACSL2BoogieTranslator took 694.52 ms. Allocated memory was 132.6 MB in the beginning and 198.7 MB in the end (delta: 66.1 MB). Free memory was 86.7 MB in the beginning and 162.0 MB in the end (delta: -75.4 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:02:47,436 INFO L168 Benchmark]: Boogie Preprocessor took 76.90 ms. Allocated memory is still 198.7 MB. Free memory was 162.0 MB in the beginning and 159.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2019-09-20 13:02:47,438 INFO L168 Benchmark]: RCFGBuilder took 636.12 ms. Allocated memory is still 198.7 MB. Free memory was 158.9 MB in the beginning and 111.9 MB in the end (delta: 47.0 MB). Peak memory consumption was 47.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:02:47,438 INFO L168 Benchmark]: TraceAbstraction took 5789.19 ms. Allocated memory was 198.7 MB in the beginning and 320.3 MB in the end (delta: 121.6 MB). Free memory was 111.9 MB in the beginning and 81.3 MB in the end (delta: 30.6 MB). Peak memory consumption was 152.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:02:47,442 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 132.6 MB. Free memory was 106.7 MB in the beginning and 106.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 694.52 ms. Allocated memory was 132.6 MB in the beginning and 198.7 MB in the end (delta: 66.1 MB). Free memory was 86.7 MB in the beginning and 162.0 MB in the end (delta: -75.4 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 76.90 ms. Allocated memory is still 198.7 MB. Free memory was 162.0 MB in the beginning and 159.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 636.12 ms. Allocated memory is still 198.7 MB. Free memory was 158.9 MB in the beginning and 111.9 MB in the end (delta: 47.0 MB). Peak memory consumption was 47.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5789.19 ms. Allocated memory was 198.7 MB in the beginning and 320.3 MB in the end (delta: 121.6 MB). Free memory was 111.9 MB in the beginning and 81.3 MB in the end (delta: 30.6 MB). Peak memory consumption was 152.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...