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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/list-simple/dll2n_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 01:47:59,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 01:47:59,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 01:47:59,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-10 01:47:59,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-10 01:47:59,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-10 01:47:59,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-10 01:47:59,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-10 01:47:59,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-10 01:47:59,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-10 01:47:59,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-10 01:47:59,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-10 01:47:59,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 01:47:59,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 01:47:59,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 01:47:59,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 01:47:59,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 01:47:59,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 01:47:59,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 01:47:59,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 01:47:59,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 01:47:59,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 01:47:59,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 01:47:59,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 01:47:59,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-10 01:47:59,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-10 01:47:59,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-10 01:47:59,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-10 01:47:59,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-10 01:47:59,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-10 01:47:59,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 01:47:59,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 01:47:59,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 01:47:59,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 01:47:59,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 01:47:59,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 01:47:59,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 01:47:59,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 01:47:59,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 01:47:59,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 01:47:59,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 01:47:59,367 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-10 01:47:59,383 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 01:47:59,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 01:47:59,384 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 01:47:59,384 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 01:47:59,385 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 01:47:59,385 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 01:47:59,385 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 01:47:59,385 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 01:47:59,386 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 01:47:59,386 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 01:47:59,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 01:47:59,387 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 01:47:59,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 01:47:59,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 01:47:59,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 01:47:59,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 01:47:59,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 01:47:59,388 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 01:47:59,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 01:47:59,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 01:47:59,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 01:47:59,389 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 01:47:59,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 01:47:59,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:47:59,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 01:47:59,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 01:47:59,390 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 01:47:59,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 01:47:59,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 01:47:59,391 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 01:47:59,420 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 01:47:59,434 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 01:47:59,439 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 01:47:59,441 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 01:47:59,441 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 01:47:59,442 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_remove_all_reverse.i [2019-09-10 01:47:59,518 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b85fd6415/1b136cad621443e18e5794dcb87c13fe/FLAG5f2bb2f98 [2019-09-10 01:48:00,050 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 01:48:00,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_remove_all_reverse.i [2019-09-10 01:48:00,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b85fd6415/1b136cad621443e18e5794dcb87c13fe/FLAG5f2bb2f98 [2019-09-10 01:48:00,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b85fd6415/1b136cad621443e18e5794dcb87c13fe [2019-09-10 01:48:00,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 01:48:00,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 01:48:00,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 01:48:00,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 01:48:00,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 01:48:00,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:48:00" (1/1) ... [2019-09-10 01:48:00,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ae3b6b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:00, skipping insertion in model container [2019-09-10 01:48:00,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:48:00" (1/1) ... [2019-09-10 01:48:00,392 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 01:48:00,449 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 01:48:00,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:48:00,907 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 01:48:00,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:48:01,031 INFO L192 MainTranslator]: Completed translation [2019-09-10 01:48:01,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:01 WrapperNode [2019-09-10 01:48:01,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 01:48:01,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 01:48:01,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 01:48:01,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 01:48:01,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:01" (1/1) ... [2019-09-10 01:48:01,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:01" (1/1) ... [2019-09-10 01:48:01,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:01" (1/1) ... [2019-09-10 01:48:01,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:01" (1/1) ... [2019-09-10 01:48:01,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:01" (1/1) ... [2019-09-10 01:48:01,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:01" (1/1) ... [2019-09-10 01:48:01,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:01" (1/1) ... [2019-09-10 01:48:01,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 01:48:01,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 01:48:01,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 01:48:01,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 01:48:01,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:01" (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 [2019-09-10 01:48:01,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 01:48:01,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 01:48:01,171 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-09-10 01:48:01,171 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-09-10 01:48:01,171 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-09-10 01:48:01,171 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-09-10 01:48:01,172 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2019-09-10 01:48:01,172 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_last [2019-09-10 01:48:01,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 01:48:01,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 01:48:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-09-10 01:48:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-09-10 01:48:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-09-10 01:48:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-09-10 01:48:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-09-10 01:48:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-09-10 01:48:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-09-10 01:48:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-09-10 01:48:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-09-10 01:48:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-09-10 01:48:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-09-10 01:48:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-09-10 01:48:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-09-10 01:48:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-09-10 01:48:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-09-10 01:48:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-09-10 01:48:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-09-10 01:48:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-09-10 01:48:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-09-10 01:48:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-09-10 01:48:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-09-10 01:48:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-09-10 01:48:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-09-10 01:48:01,177 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-09-10 01:48:01,177 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-09-10 01:48:01,177 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-09-10 01:48:01,177 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-09-10 01:48:01,177 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-09-10 01:48:01,177 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-09-10 01:48:01,178 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-09-10 01:48:01,178 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-09-10 01:48:01,178 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-09-10 01:48:01,178 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-09-10 01:48:01,178 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-09-10 01:48:01,178 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-09-10 01:48:01,178 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-09-10 01:48:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-09-10 01:48:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-09-10 01:48:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-09-10 01:48:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-09-10 01:48:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-09-10 01:48:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-09-10 01:48:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-09-10 01:48:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-09-10 01:48:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-09-10 01:48:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-09-10 01:48:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-09-10 01:48:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-09-10 01:48:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-09-10 01:48:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-09-10 01:48:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-09-10 01:48:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-09-10 01:48:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-10 01:48:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-09-10 01:48:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-09-10 01:48:01,182 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-10 01:48:01,182 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-09-10 01:48:01,182 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-09-10 01:48:01,182 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-09-10 01:48:01,182 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-09-10 01:48:01,182 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-09-10 01:48:01,182 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-09-10 01:48:01,183 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-09-10 01:48:01,183 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-09-10 01:48:01,183 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-09-10 01:48:01,183 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-10 01:48:01,183 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-09-10 01:48:01,183 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-09-10 01:48:01,184 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-09-10 01:48:01,184 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-09-10 01:48:01,184 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-09-10 01:48:01,184 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-09-10 01:48:01,184 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-09-10 01:48:01,184 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-09-10 01:48:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-09-10 01:48:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-09-10 01:48:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-09-10 01:48:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-09-10 01:48:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-09-10 01:48:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-09-10 01:48:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-09-10 01:48:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-09-10 01:48:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-09-10 01:48:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-09-10 01:48:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-09-10 01:48:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-09-10 01:48:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-09-10 01:48:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-09-10 01:48:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-09-10 01:48:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-09-10 01:48:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-09-10 01:48:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-09-10 01:48:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-09-10 01:48:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-09-10 01:48:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-09-10 01:48:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-09-10 01:48:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-09-10 01:48:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-09-10 01:48:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-09-10 01:48:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-09-10 01:48:01,188 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-09-10 01:48:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-09-10 01:48:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-09-10 01:48:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-09-10 01:48:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-09-10 01:48:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-09-10 01:48:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-09-10 01:48:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-10 01:48:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-10 01:48:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-10 01:48:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2019-09-10 01:48:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_last [2019-09-10 01:48:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-10 01:48:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-10 01:48:01,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 01:48:01,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-10 01:48:01,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-09-10 01:48:01,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 01:48:01,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 01:48:01,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-10 01:48:01,551 INFO L684 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-09-10 01:48:01,777 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 01:48:01,778 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-10 01:48:01,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:48:01 BoogieIcfgContainer [2019-09-10 01:48:01,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 01:48:01,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 01:48:01,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 01:48:01,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 01:48:01,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 01:48:00" (1/3) ... [2019-09-10 01:48:01,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e72ca0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:48:01, skipping insertion in model container [2019-09-10 01:48:01,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:48:01" (2/3) ... [2019-09-10 01:48:01,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e72ca0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:48:01, skipping insertion in model container [2019-09-10 01:48:01,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:48:01" (3/3) ... [2019-09-10 01:48:01,787 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2019-09-10 01:48:01,796 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 01:48:01,803 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 01:48:01,819 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 01:48:01,845 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 01:48:01,845 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 01:48:01,845 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 01:48:01,846 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 01:48:01,846 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 01:48:01,846 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 01:48:01,846 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 01:48:01,846 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 01:48:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-09-10 01:48:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-10 01:48:01,871 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:48:01,871 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:48:01,873 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:48:01,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:01,878 INFO L82 PathProgramCache]: Analyzing trace with hash 69017892, now seen corresponding path program 1 times [2019-09-10 01:48:01,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:48:01,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:01,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:48:01,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:01,933 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:48:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:48:02,064 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:48:02,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-10 01:48:02,065 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:02,069 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-10 01:48:02,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-10 01:48:02,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-10 01:48:02,083 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2019-09-10 01:48:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:02,142 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2019-09-10 01:48:02,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 01:48:02,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-09-10 01:48:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:02,152 INFO L225 Difference]: With dead ends: 41 [2019-09-10 01:48:02,153 INFO L226 Difference]: Without dead ends: 34 [2019-09-10 01:48:02,157 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-10 01:48:02,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-10 01:48:02,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-09-10 01:48:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-10 01:48:02,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-09-10 01:48:02,202 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 17 [2019-09-10 01:48:02,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:02,203 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-09-10 01:48:02,203 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-10 01:48:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-09-10 01:48:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-10 01:48:02,204 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:48:02,204 INFO L399 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] [2019-09-10 01:48:02,205 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:48:02,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:02,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1755402763, now seen corresponding path program 1 times [2019-09-10 01:48:02,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:48:02,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:02,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:48:02,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:02,208 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:48:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:48:02,388 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:48:02,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-10 01:48:02,388 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:02,390 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 01:48:02,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 01:48:02,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-10 01:48:02,391 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2019-09-10 01:48:02,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:02,553 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-09-10 01:48:02,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 01:48:02,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-09-10 01:48:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:02,555 INFO L225 Difference]: With dead ends: 44 [2019-09-10 01:48:02,556 INFO L226 Difference]: Without dead ends: 32 [2019-09-10 01:48:02,557 INFO L628 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 [2019-09-10 01:48:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-10 01:48:02,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-10 01:48:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-10 01:48:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-09-10 01:48:02,562 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2019-09-10 01:48:02,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:02,563 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-09-10 01:48:02,563 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 01:48:02,563 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-09-10 01:48:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-10 01:48:02,564 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:48:02,565 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:48:02,565 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:48:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:02,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1097743824, now seen corresponding path program 1 times [2019-09-10 01:48:02,565 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:48:02,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:02,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:48:02,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:02,567 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:48:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:48:02,632 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:48:02,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 01:48:02,632 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:02,632 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 01:48:02,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 01:48:02,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 01:48:02,633 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2019-09-10 01:48:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:02,670 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-09-10 01:48:02,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 01:48:02,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-09-10 01:48:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:02,672 INFO L225 Difference]: With dead ends: 40 [2019-09-10 01:48:02,672 INFO L226 Difference]: Without dead ends: 37 [2019-09-10 01:48:02,672 INFO L628 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 [2019-09-10 01:48:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-10 01:48:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2019-09-10 01:48:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-10 01:48:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-09-10 01:48:02,678 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 27 [2019-09-10 01:48:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:02,678 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-09-10 01:48:02,678 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 01:48:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-09-10 01:48:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-10 01:48:02,680 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:48:02,680 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:48:02,680 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:48:02,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:02,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1690382154, now seen corresponding path program 1 times [2019-09-10 01:48:02,681 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:48:02,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:02,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:48:02,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:02,683 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:48:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:48:02,765 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:48:02,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 01:48:02,766 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:02,766 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 01:48:02,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 01:48:02,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:48:02,767 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 3 states. [2019-09-10 01:48:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:02,792 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2019-09-10 01:48:02,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 01:48:02,792 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-10 01:48:02,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:02,793 INFO L225 Difference]: With dead ends: 37 [2019-09-10 01:48:02,793 INFO L226 Difference]: Without dead ends: 37 [2019-09-10 01:48:02,794 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:48:02,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-10 01:48:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-09-10 01:48:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-10 01:48:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-09-10 01:48:02,802 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 32 [2019-09-10 01:48:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:02,803 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-09-10 01:48:02,803 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 01:48:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-09-10 01:48:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-10 01:48:02,805 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:48:02,806 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:48:02,806 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:48:02,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:02,806 INFO L82 PathProgramCache]: Analyzing trace with hash 2113083980, now seen corresponding path program 1 times [2019-09-10 01:48:02,807 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:48:02,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:02,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:48:02,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:02,809 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:48:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:48:02,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:48:02,904 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:48:02,905 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2019-09-10 01:48:02,907 INFO L207 CegarAbsIntRunner]: [17], [22], [27], [30], [36], [38], [39], [40], [41], [43], [49], [51], [54], [58], [61], [64], [69], [76], [78], [84], [86], [91], [93], [97], [98], [104], [105], [106], [107], [110], [111], [112] [2019-09-10 01:48:02,946 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:48:02,946 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:48:03,042 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-10 01:48:03,044 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 0. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 26 variables. [2019-09-10 01:48:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:03,049 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-10 01:48:03,108 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-10 01:48:03,108 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-10 01:48:03,111 INFO L420 sIntCurrentIteration]: We unified 31 AI predicates to 31 [2019-09-10 01:48:03,111 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-10 01:48:03,112 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-10 01:48:03,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 6 [2019-09-10 01:48:03,113 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:03,113 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 01:48:03,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 01:48:03,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:48:03,114 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 2 states. [2019-09-10 01:48:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:03,115 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-10 01:48:03,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 01:48:03,116 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-09-10 01:48:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:03,116 INFO L225 Difference]: With dead ends: 6 [2019-09-10 01:48:03,116 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 01:48:03,117 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:48:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 01:48:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 01:48:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 01:48:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 01:48:03,118 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2019-09-10 01:48:03,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:03,118 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 01:48:03,118 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 01:48:03,118 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 01:48:03,118 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 01:48:03,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 01:48:03 BoogieIcfgContainer [2019-09-10 01:48:03,124 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 01:48:03,127 INFO L168 Benchmark]: Toolchain (without parser) took 2757.69 ms. Allocated memory was 136.3 MB in the beginning and 234.4 MB in the end (delta: 98.0 MB). Free memory was 89.8 MB in the beginning and 143.1 MB in the end (delta: -53.3 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:03,128 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 136.3 MB. Free memory was 109.6 MB in the beginning and 109.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 01:48:03,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 657.01 ms. Allocated memory was 136.3 MB in the beginning and 203.4 MB in the end (delta: 67.1 MB). Free memory was 89.6 MB in the beginning and 166.9 MB in the end (delta: -77.3 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:03,131 INFO L168 Benchmark]: Boogie Preprocessor took 70.19 ms. Allocated memory is still 203.4 MB. Free memory was 166.9 MB in the beginning and 164.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:03,133 INFO L168 Benchmark]: RCFGBuilder took 668.83 ms. Allocated memory is still 203.4 MB. Free memory was 164.0 MB in the beginning and 117.9 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:03,134 INFO L168 Benchmark]: TraceAbstraction took 1343.80 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 117.9 MB in the beginning and 143.1 MB in the end (delta: -25.3 MB). Peak memory consumption was 5.7 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:03,143 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 136.3 MB. Free memory was 109.6 MB in the beginning and 109.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 657.01 ms. Allocated memory was 136.3 MB in the beginning and 203.4 MB in the end (delta: 67.1 MB). Free memory was 89.6 MB in the beginning and 166.9 MB in the end (delta: -77.3 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.19 ms. Allocated memory is still 203.4 MB. Free memory was 166.9 MB in the beginning and 164.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 668.83 ms. Allocated memory is still 203.4 MB. Free memory was 164.0 MB in the beginning and 117.9 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1343.80 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 117.9 MB in the beginning and 143.1 MB in the end (delta: -25.3 MB). Peak memory consumption was 5.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 619]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. SAFE Result, 1.2s OverallTime, 5 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 142 SDtfs, 42 SDslu, 282 SDs, 0 SdLazy, 88 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.967741935483871 AbsIntWeakeningRatio, 1.4516129032258065 AbsIntAvgWeakeningVarsNumRemoved, 0.1935483870967742 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 127 ConstructedInterpolants, 0 QuantifiedInterpolants, 7051 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 5/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...