/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:55:39,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:55:39,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:55:39,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:55:39,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:55:39,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:55:39,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:55:39,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:55:39,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:55:39,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:55:39,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:55:39,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:55:39,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:55:39,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:55:39,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:55:39,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:55:39,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:55:39,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:55:39,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:55:39,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:55:39,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:55:39,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:55:39,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:55:39,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:55:39,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 00:55:39,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 00:55:39,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 00:55:39,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 00:55:39,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 00:55:39,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 00:55:39,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 00:55:39,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 00:55:39,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 00:55:39,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 00:55:39,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 00:55:39,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 00:55:39,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 00:55:39,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 00:55:39,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:55:39,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:55:39,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:55:39,411 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:55:39,429 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:55:39,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:55:39,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:55:39,432 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:55:39,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:55:39,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:55:39,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:55:39,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:55:39,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:55:39,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:55:39,434 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:55:39,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:55:39,434 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:55:39,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:55:39,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:55:39,435 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:55:39,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:55:39,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:55:39,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:55:39,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:55:39,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:55:39,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:55:39,437 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:55:39,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:55:39,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:55:40,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:55:40,003 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:55:40,004 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:55:40,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-11-07 00:55:40,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a137251b/782d04e2bd084a038b920dc2e2a3c1dd/FLAG1f85b87d5 [2020-11-07 00:55:40,882 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:55:40,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-11-07 00:55:40,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a137251b/782d04e2bd084a038b920dc2e2a3c1dd/FLAG1f85b87d5 [2020-11-07 00:55:41,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a137251b/782d04e2bd084a038b920dc2e2a3c1dd [2020-11-07 00:55:41,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:55:41,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:55:41,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:55:41,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:55:41,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:55:41,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:41" (1/1) ... [2020-11-07 00:55:41,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c02b83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:41, skipping insertion in model container [2020-11-07 00:55:41,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:41" (1/1) ... [2020-11-07 00:55:41,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:55:41,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:55:41,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:55:41,894 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:55:41,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:55:42,050 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:55:42,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:42 WrapperNode [2020-11-07 00:55:42,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:55:42,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:55:42,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:55:42,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:55:42,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:42" (1/1) ... [2020-11-07 00:55:42,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:42" (1/1) ... [2020-11-07 00:55:42,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:42" (1/1) ... [2020-11-07 00:55:42,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:42" (1/1) ... [2020-11-07 00:55:42,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:42" (1/1) ... [2020-11-07 00:55:42,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:42" (1/1) ... [2020-11-07 00:55:42,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:42" (1/1) ... [2020-11-07 00:55:42,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:55:42,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:55:42,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:55:42,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:55:42,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:55:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:55:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:55:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:55:42,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:55:42,251 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-07 00:55:42,251 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-07 00:55:42,251 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-07 00:55:42,252 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-07 00:55:42,252 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-07 00:55:42,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-07 00:55:42,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-07 00:55:42,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-07 00:55:42,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-07 00:55:42,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-07 00:55:42,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-07 00:55:42,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-07 00:55:42,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-07 00:55:42,254 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-07 00:55:42,254 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-07 00:55:42,254 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-07 00:55:42,254 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-07 00:55:42,254 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-07 00:55:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-07 00:55:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-07 00:55:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-07 00:55:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-07 00:55:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-07 00:55:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-07 00:55:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-07 00:55:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-07 00:55:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-07 00:55:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-07 00:55:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-07 00:55:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-07 00:55:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-07 00:55:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-07 00:55:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-07 00:55:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-07 00:55:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-07 00:55:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-07 00:55:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-07 00:55:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-07 00:55:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-07 00:55:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-07 00:55:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-07 00:55:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-07 00:55:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-07 00:55:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-07 00:55:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-07 00:55:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-07 00:55:42,260 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-07 00:55:42,260 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-07 00:55:42,260 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-07 00:55:42,260 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-07 00:55:42,260 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 00:55:42,260 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-07 00:55:42,261 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-07 00:55:42,261 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-07 00:55:42,261 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-07 00:55:42,261 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-07 00:55:42,261 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-07 00:55:42,261 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-07 00:55:42,262 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-07 00:55:42,262 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:55:42,262 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-07 00:55:42,262 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-07 00:55:42,262 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-07 00:55:42,263 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 00:55:42,263 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-07 00:55:42,263 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-07 00:55:42,263 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-07 00:55:42,263 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-07 00:55:42,263 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-07 00:55:42,264 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-07 00:55:42,264 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-07 00:55:42,264 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-07 00:55:42,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-07 00:55:42,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-07 00:55:42,265 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-07 00:55:42,265 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-07 00:55:42,265 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-07 00:55:42,265 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-07 00:55:42,265 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-07 00:55:42,265 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-07 00:55:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-07 00:55:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-07 00:55:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-07 00:55:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-07 00:55:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-07 00:55:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-07 00:55:42,267 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-07 00:55:42,267 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-07 00:55:42,267 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-07 00:55:42,267 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-07 00:55:42,267 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-07 00:55:42,267 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-07 00:55:42,268 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-07 00:55:42,268 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-07 00:55:42,268 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-07 00:55:42,268 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-07 00:55:42,268 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-07 00:55:42,268 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-07 00:55:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-07 00:55:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-07 00:55:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-07 00:55:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-07 00:55:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-07 00:55:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:55:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:55:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 00:55:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 00:55:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:55:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:55:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:55:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 00:55:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 00:55:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 00:55:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:55:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:55:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:55:42,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:55:42,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:55:42,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:55:43,378 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:55:43,379 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-11-07 00:55:43,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:55:43 BoogieIcfgContainer [2020-11-07 00:55:43,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:55:43,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:55:43,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:55:43,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:55:43,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:55:41" (1/3) ... [2020-11-07 00:55:43,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f84715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:55:43, skipping insertion in model container [2020-11-07 00:55:43,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:42" (2/3) ... [2020-11-07 00:55:43,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f84715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:55:43, skipping insertion in model container [2020-11-07 00:55:43,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:55:43" (3/3) ... [2020-11-07 00:55:43,391 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-11-07 00:55:43,410 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:55:43,415 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:55:43,428 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:55:43,455 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:55:43,456 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:55:43,456 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:55:43,456 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:55:43,456 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:55:43,456 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:55:43,457 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:55:43,457 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:55:43,478 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-11-07 00:55:43,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-07 00:55:43,488 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:55:43,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:55:43,489 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:55:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:55:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash -296062564, now seen corresponding path program 1 times [2020-11-07 00:55:43,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:55:43,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267361501] [2020-11-07 00:55:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:55:43,607 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:55:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:43,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:55:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:55:43,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267361501] [2020-11-07 00:55:43,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:55:43,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 00:55:43,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768477051] [2020-11-07 00:55:43,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 00:55:43,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:55:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 00:55:43,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:55:43,956 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 5 states. [2020-11-07 00:55:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:55:44,792 INFO L93 Difference]: Finished difference Result 357 states and 502 transitions. [2020-11-07 00:55:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 00:55:44,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-07 00:55:44,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:55:44,807 INFO L225 Difference]: With dead ends: 357 [2020-11-07 00:55:44,807 INFO L226 Difference]: Without dead ends: 186 [2020-11-07 00:55:44,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:55:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-07 00:55:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-11-07 00:55:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-07 00:55:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 179 transitions. [2020-11-07 00:55:45,000 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 179 transitions. Word has length 19 [2020-11-07 00:55:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:55:45,001 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 179 transitions. [2020-11-07 00:55:45,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 00:55:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 179 transitions. [2020-11-07 00:55:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-07 00:55:45,004 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:55:45,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:55:45,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:55:45,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:55:45,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:55:45,007 INFO L82 PathProgramCache]: Analyzing trace with hash -333799104, now seen corresponding path program 1 times [2020-11-07 00:55:45,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:55:45,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008814887] [2020-11-07 00:55:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:55:45,026 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:55:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:45,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:55:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:55:45,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008814887] [2020-11-07 00:55:45,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:55:45,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:55:45,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820098597] [2020-11-07 00:55:45,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:55:45,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:55:45,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:55:45,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:55:45,213 INFO L87 Difference]: Start difference. First operand 159 states and 179 transitions. Second operand 4 states. [2020-11-07 00:55:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:55:45,895 INFO L93 Difference]: Finished difference Result 167 states and 187 transitions. [2020-11-07 00:55:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:55:45,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-07 00:55:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:55:45,900 INFO L225 Difference]: With dead ends: 167 [2020-11-07 00:55:45,900 INFO L226 Difference]: Without dead ends: 160 [2020-11-07 00:55:45,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:55:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-07 00:55:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-11-07 00:55:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-07 00:55:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2020-11-07 00:55:45,928 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 31 [2020-11-07 00:55:45,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:55:45,928 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2020-11-07 00:55:45,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:55:45,929 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2020-11-07 00:55:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-07 00:55:45,930 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:55:45,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:55:45,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:55:45,931 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:55:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:55:45,932 INFO L82 PathProgramCache]: Analyzing trace with hash -885790979, now seen corresponding path program 1 times [2020-11-07 00:55:45,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:55:45,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988112284] [2020-11-07 00:55:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:55:45,939 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:55:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:46,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:55:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:55:46,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988112284] [2020-11-07 00:55:46,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:55:46,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:55:46,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082506925] [2020-11-07 00:55:46,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:55:46,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:55:46,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:55:46,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:55:46,193 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand 8 states. [2020-11-07 00:55:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:55:47,409 INFO L93 Difference]: Finished difference Result 246 states and 279 transitions. [2020-11-07 00:55:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 00:55:47,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-11-07 00:55:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:55:47,413 INFO L225 Difference]: With dead ends: 246 [2020-11-07 00:55:47,413 INFO L226 Difference]: Without dead ends: 239 [2020-11-07 00:55:47,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:55:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-11-07 00:55:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 155. [2020-11-07 00:55:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-11-07 00:55:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 174 transitions. [2020-11-07 00:55:47,445 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 174 transitions. Word has length 33 [2020-11-07 00:55:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:55:47,445 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 174 transitions. [2020-11-07 00:55:47,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:55:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 174 transitions. [2020-11-07 00:55:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 00:55:47,447 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:55:47,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:55:47,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:55:47,448 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:55:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:55:47,449 INFO L82 PathProgramCache]: Analyzing trace with hash 531390644, now seen corresponding path program 1 times [2020-11-07 00:55:47,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:55:47,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789717135] [2020-11-07 00:55:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:55:47,454 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:55:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:47,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:55:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:55:47,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789717135] [2020-11-07 00:55:47,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:55:47,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:55:47,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506855624] [2020-11-07 00:55:47,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:55:47,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:55:47,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:55:47,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:55:47,620 INFO L87 Difference]: Start difference. First operand 155 states and 174 transitions. Second operand 6 states. [2020-11-07 00:55:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:55:48,485 INFO L93 Difference]: Finished difference Result 357 states and 407 transitions. [2020-11-07 00:55:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:55:48,486 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-11-07 00:55:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:55:48,489 INFO L225 Difference]: With dead ends: 357 [2020-11-07 00:55:48,489 INFO L226 Difference]: Without dead ends: 237 [2020-11-07 00:55:48,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:55:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-11-07 00:55:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 158. [2020-11-07 00:55:48,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 00:55:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2020-11-07 00:55:48,522 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 39 [2020-11-07 00:55:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:55:48,523 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2020-11-07 00:55:48,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:55:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2020-11-07 00:55:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 00:55:48,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:55:48,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:55:48,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:55:48,526 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:55:48,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:55:48,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1103718031, now seen corresponding path program 1 times [2020-11-07 00:55:48,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:55:48,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28145508] [2020-11-07 00:55:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:55:48,533 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:55:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:48,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:55:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:55:48,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28145508] [2020-11-07 00:55:48,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:55:48,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:55:48,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382327544] [2020-11-07 00:55:48,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:55:48,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:55:48,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:55:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:55:48,666 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand 6 states. [2020-11-07 00:55:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:55:49,418 INFO L93 Difference]: Finished difference Result 259 states and 293 transitions. [2020-11-07 00:55:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 00:55:49,418 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-11-07 00:55:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:55:49,421 INFO L225 Difference]: With dead ends: 259 [2020-11-07 00:55:49,421 INFO L226 Difference]: Without dead ends: 228 [2020-11-07 00:55:49,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:55:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-11-07 00:55:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 158. [2020-11-07 00:55:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 00:55:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 176 transitions. [2020-11-07 00:55:49,448 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 176 transitions. Word has length 41 [2020-11-07 00:55:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:55:49,448 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 176 transitions. [2020-11-07 00:55:49,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:55:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 176 transitions. [2020-11-07 00:55:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 00:55:49,450 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:55:49,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:55:49,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:55:49,451 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:55:49,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:55:49,452 INFO L82 PathProgramCache]: Analyzing trace with hash -107537349, now seen corresponding path program 1 times [2020-11-07 00:55:49,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:55:49,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141704700] [2020-11-07 00:55:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:55:49,458 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:55:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:49,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:55:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:55:49,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141704700] [2020-11-07 00:55:49,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:55:49,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 00:55:49,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446770780] [2020-11-07 00:55:49,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 00:55:49,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:55:49,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 00:55:49,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:55:49,869 INFO L87 Difference]: Start difference. First operand 158 states and 176 transitions. Second operand 12 states. [2020-11-07 00:55:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:55:51,485 INFO L93 Difference]: Finished difference Result 276 states and 310 transitions. [2020-11-07 00:55:51,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 00:55:51,487 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-11-07 00:55:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:55:51,491 INFO L225 Difference]: With dead ends: 276 [2020-11-07 00:55:51,491 INFO L226 Difference]: Without dead ends: 271 [2020-11-07 00:55:51,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:55:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-11-07 00:55:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 173. [2020-11-07 00:55:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-11-07 00:55:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 192 transitions. [2020-11-07 00:55:51,529 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 192 transitions. Word has length 48 [2020-11-07 00:55:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:55:51,529 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 192 transitions. [2020-11-07 00:55:51,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 00:55:51,529 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 192 transitions. [2020-11-07 00:55:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 00:55:51,541 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:55:51,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:55:51,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:55:51,542 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:55:51,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:55:51,542 INFO L82 PathProgramCache]: Analyzing trace with hash -135462151, now seen corresponding path program 1 times [2020-11-07 00:55:51,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:55:51,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571692177] [2020-11-07 00:55:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:55:51,551 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:55:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:51,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:55:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:55:51,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571692177] [2020-11-07 00:55:51,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:55:51,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:55:51,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296650308] [2020-11-07 00:55:51,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:55:51,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:55:51,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:55:51,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:55:51,669 INFO L87 Difference]: Start difference. First operand 173 states and 192 transitions. Second operand 4 states. [2020-11-07 00:55:52,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:55:52,209 INFO L93 Difference]: Finished difference Result 272 states and 309 transitions. [2020-11-07 00:55:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:55:52,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-11-07 00:55:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:55:52,212 INFO L225 Difference]: With dead ends: 272 [2020-11-07 00:55:52,213 INFO L226 Difference]: Without dead ends: 209 [2020-11-07 00:55:52,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:55:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-07 00:55:52,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 176. [2020-11-07 00:55:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-11-07 00:55:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 196 transitions. [2020-11-07 00:55:52,250 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 196 transitions. Word has length 49 [2020-11-07 00:55:52,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:55:52,252 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 196 transitions. [2020-11-07 00:55:52,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:55:52,252 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 196 transitions. [2020-11-07 00:55:52,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-07 00:55:52,253 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:55:52,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:55:52,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:55:52,255 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:55:52,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:55:52,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1820914827, now seen corresponding path program 1 times [2020-11-07 00:55:52,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:55:52,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985338737] [2020-11-07 00:55:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:55:52,262 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:55:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:52,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:55:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:55:52,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985338737] [2020-11-07 00:55:52,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:55:52,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:55:52,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015564334] [2020-11-07 00:55:52,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:55:52,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:55:52,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:55:52,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:55:52,386 INFO L87 Difference]: Start difference. First operand 176 states and 196 transitions. Second operand 4 states. [2020-11-07 00:55:52,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:55:52,868 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2020-11-07 00:55:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:55:52,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-11-07 00:55:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:55:52,874 INFO L225 Difference]: With dead ends: 179 [2020-11-07 00:55:52,874 INFO L226 Difference]: Without dead ends: 175 [2020-11-07 00:55:52,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:55:52,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-11-07 00:55:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-11-07 00:55:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-11-07 00:55:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 194 transitions. [2020-11-07 00:55:52,901 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 194 transitions. Word has length 51 [2020-11-07 00:55:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:55:52,901 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 194 transitions. [2020-11-07 00:55:52,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:55:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 194 transitions. [2020-11-07 00:55:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-07 00:55:52,903 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:55:52,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:55:52,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 00:55:52,904 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:55:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:55:52,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1210911317, now seen corresponding path program 1 times [2020-11-07 00:55:52,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:55:52,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838808897] [2020-11-07 00:55:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:55:52,910 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:55:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:53,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:55:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:55:53,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838808897] [2020-11-07 00:55:53,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:55:53,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:55:53,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563000393] [2020-11-07 00:55:53,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:55:53,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:55:53,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:55:53,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:55:53,181 INFO L87 Difference]: Start difference. First operand 175 states and 194 transitions. Second operand 9 states. [2020-11-07 00:55:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:55:54,581 INFO L93 Difference]: Finished difference Result 356 states and 401 transitions. [2020-11-07 00:55:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 00:55:54,582 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-11-07 00:55:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:55:54,587 INFO L225 Difference]: With dead ends: 356 [2020-11-07 00:55:54,587 INFO L226 Difference]: Without dead ends: 291 [2020-11-07 00:55:54,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:55:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-11-07 00:55:54,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 194. [2020-11-07 00:55:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-07 00:55:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 214 transitions. [2020-11-07 00:55:54,623 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 214 transitions. Word has length 55 [2020-11-07 00:55:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:55:54,625 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 214 transitions. [2020-11-07 00:55:54,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:55:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 214 transitions. [2020-11-07 00:55:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-07 00:55:54,626 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:55:54,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:55:54,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 00:55:54,627 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:55:54,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:55:54,627 INFO L82 PathProgramCache]: Analyzing trace with hash -270220700, now seen corresponding path program 1 times [2020-11-07 00:55:54,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:55:54,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402725225] [2020-11-07 00:55:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:55:54,742 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-11-07 00:55:54,834 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:55:54,838 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:55:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:55,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:55:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:55:55,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402725225] [2020-11-07 00:55:55,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:55:55,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:55:55,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944218513] [2020-11-07 00:55:55,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:55:55,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:55:55,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:55:55,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:55:55,087 INFO L87 Difference]: Start difference. First operand 194 states and 214 transitions. Second operand 8 states. [2020-11-07 00:55:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:55:56,073 INFO L93 Difference]: Finished difference Result 275 states and 306 transitions. [2020-11-07 00:55:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:55:56,074 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-11-07 00:55:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:55:56,076 INFO L225 Difference]: With dead ends: 275 [2020-11-07 00:55:56,076 INFO L226 Difference]: Without dead ends: 245 [2020-11-07 00:55:56,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:55:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-11-07 00:55:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 229. [2020-11-07 00:55:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-11-07 00:55:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 256 transitions. [2020-11-07 00:55:56,126 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 256 transitions. Word has length 60 [2020-11-07 00:55:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:55:56,127 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 256 transitions. [2020-11-07 00:55:56,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:55:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 256 transitions. [2020-11-07 00:55:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-07 00:55:56,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:55:56,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:55:56,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 00:55:56,129 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:55:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:55:56,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1306628089, now seen corresponding path program 1 times [2020-11-07 00:55:56,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:55:56,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299805542] [2020-11-07 00:55:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:55:56,135 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:55:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:56,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:55:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:55:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:55:57,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299805542] [2020-11-07 00:55:57,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:55:57,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 00:55:57,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345399961] [2020-11-07 00:55:57,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 00:55:57,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:55:57,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 00:55:57,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:55:57,004 INFO L87 Difference]: Start difference. First operand 229 states and 256 transitions. Second operand 16 states. [2020-11-07 00:55:58,754 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-11-07 00:55:59,330 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-11-07 00:55:59,599 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 00:55:59,796 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-11-07 00:56:00,555 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-07 00:56:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:02,887 INFO L93 Difference]: Finished difference Result 631 states and 711 transitions. [2020-11-07 00:56:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 00:56:02,888 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-11-07 00:56:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:02,893 INFO L225 Difference]: With dead ends: 631 [2020-11-07 00:56:02,893 INFO L226 Difference]: Without dead ends: 626 [2020-11-07 00:56:02,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=470, Invalid=1980, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 00:56:02,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2020-11-07 00:56:02,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 246. [2020-11-07 00:56:02,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-11-07 00:56:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 274 transitions. [2020-11-07 00:56:02,950 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 274 transitions. Word has length 60 [2020-11-07 00:56:02,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:02,951 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 274 transitions. [2020-11-07 00:56:02,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 00:56:02,951 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 274 transitions. [2020-11-07 00:56:02,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-07 00:56:02,952 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:02,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:02,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 00:56:02,953 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash 907155636, now seen corresponding path program 1 times [2020-11-07 00:56:02,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:02,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600344810] [2020-11-07 00:56:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:02,957 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:03,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:03,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600344810] [2020-11-07 00:56:03,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:03,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:56:03,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346194825] [2020-11-07 00:56:03,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:56:03,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:03,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:56:03,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:03,057 INFO L87 Difference]: Start difference. First operand 246 states and 274 transitions. Second operand 4 states. [2020-11-07 00:56:03,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:03,555 INFO L93 Difference]: Finished difference Result 254 states and 282 transitions. [2020-11-07 00:56:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:56:03,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-11-07 00:56:03,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:03,559 INFO L225 Difference]: With dead ends: 254 [2020-11-07 00:56:03,559 INFO L226 Difference]: Without dead ends: 247 [2020-11-07 00:56:03,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:03,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-11-07 00:56:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2020-11-07 00:56:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-11-07 00:56:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 275 transitions. [2020-11-07 00:56:03,612 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 275 transitions. Word has length 62 [2020-11-07 00:56:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:03,612 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 275 transitions. [2020-11-07 00:56:03,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:56:03,612 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 275 transitions. [2020-11-07 00:56:03,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 00:56:03,613 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:03,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:03,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 00:56:03,614 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:03,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:03,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2063195505, now seen corresponding path program 1 times [2020-11-07 00:56:03,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:03,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001132776] [2020-11-07 00:56:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:03,618 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:03,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:03,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001132776] [2020-11-07 00:56:03,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:03,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:56:03,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618538018] [2020-11-07 00:56:03,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:56:03,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:03,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:56:03,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:56:03,776 INFO L87 Difference]: Start difference. First operand 247 states and 275 transitions. Second operand 8 states. [2020-11-07 00:56:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:04,812 INFO L93 Difference]: Finished difference Result 270 states and 299 transitions. [2020-11-07 00:56:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 00:56:04,813 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2020-11-07 00:56:04,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:04,814 INFO L225 Difference]: With dead ends: 270 [2020-11-07 00:56:04,814 INFO L226 Difference]: Without dead ends: 263 [2020-11-07 00:56:04,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:56:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-11-07 00:56:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 242. [2020-11-07 00:56:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-11-07 00:56:04,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 269 transitions. [2020-11-07 00:56:04,866 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 269 transitions. Word has length 64 [2020-11-07 00:56:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:04,867 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 269 transitions. [2020-11-07 00:56:04,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:56:04,867 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 269 transitions. [2020-11-07 00:56:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 00:56:04,868 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:04,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:04,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 00:56:04,868 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:04,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:04,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1588921325, now seen corresponding path program 1 times [2020-11-07 00:56:04,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:04,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474682337] [2020-11-07 00:56:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:04,873 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:56:04,888 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:56:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:56:04,905 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:56:04,943 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:56:04,943 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:56:04,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 00:56:04,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:56:04 BoogieIcfgContainer [2020-11-07 00:56:04,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:56:04,966 INFO L168 Benchmark]: Toolchain (without parser) took 23842.02 ms. Allocated memory was 156.2 MB in the beginning and 226.5 MB in the end (delta: 70.3 MB). Free memory was 130.9 MB in the beginning and 96.7 MB in the end (delta: 34.2 MB). Peak memory consumption was 105.2 MB. Max. memory is 8.0 GB. [2020-11-07 00:56:04,967 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 156.2 MB. Free memory was 131.5 MB in the beginning and 131.5 MB in the end (delta: 79.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:56:04,967 INFO L168 Benchmark]: CACSL2BoogieTranslator took 914.42 ms. Allocated memory is still 156.2 MB. Free memory was 130.1 MB in the beginning and 138.0 MB in the end (delta: -7.9 MB). Peak memory consumption was 27.8 MB. Max. memory is 8.0 GB. [2020-11-07 00:56:04,970 INFO L168 Benchmark]: Boogie Preprocessor took 95.31 ms. Allocated memory is still 156.2 MB. Free memory was 138.0 MB in the beginning and 134.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:56:04,977 INFO L168 Benchmark]: RCFGBuilder took 1229.19 ms. Allocated memory is still 156.2 MB. Free memory was 134.9 MB in the beginning and 132.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 61.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:56:04,978 INFO L168 Benchmark]: TraceAbstraction took 21581.23 ms. Allocated memory was 156.2 MB in the beginning and 226.5 MB in the end (delta: 70.3 MB). Free memory was 131.6 MB in the beginning and 96.7 MB in the end (delta: 34.9 MB). Peak memory consumption was 105.6 MB. Max. memory is 8.0 GB. [2020-11-07 00:56:04,984 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 156.2 MB. Free memory was 131.5 MB in the beginning and 131.5 MB in the end (delta: 79.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 914.42 ms. Allocated memory is still 156.2 MB. Free memory was 130.1 MB in the beginning and 138.0 MB in the end (delta: -7.9 MB). Peak memory consumption was 27.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 95.31 ms. Allocated memory is still 156.2 MB. Free memory was 138.0 MB in the beginning and 134.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1229.19 ms. Allocated memory is still 156.2 MB. Free memory was 134.9 MB in the beginning and 132.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 61.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 21581.23 ms. Allocated memory was 156.2 MB in the beginning and 226.5 MB in the end (delta: 70.3 MB). Free memory was 131.6 MB in the beginning and 96.7 MB in the end (delta: 34.9 MB). Peak memory consumption was 105.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 992]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1003] SLL* list = malloc(sizeof(SLL)); [L1004] list->next = ((void*)0) [L1005] list->prev = ((void*)0) [L1006] COND FALSE !(!(list != ((void*)0))) [L1006] COND FALSE !(__VERIFIER_nondet_int()) [L1006] list->inner = malloc(sizeof(SLL)) [L1006] EXPR list->inner [L1006] list->inner->next = ((void*)0) [L1006] EXPR list->inner [L1006] list->inner->inner = ((void*)0) [L1006] EXPR list->inner [L1006] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L1006] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L1008] SLL* end = list; [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1022] end = ((void*)0) [L1023] end = list [L1026] COND FALSE !(!(((void*)0) != end)) [L1028] COND TRUE ((void*)0) != end [L1030] int len = 0; [L1031] EXPR end->inner [L1031] SLL* inner = end->inner; [L1032] COND TRUE ((void*)0) != inner [L1034] COND TRUE len == 0 [L1035] len = 1 [L1038] COND FALSE !(!(((void*)0) != inner)) [L1039] EXPR inner->inner [L1039] COND FALSE !(!(((void*)0) == inner->inner)) [L1040] EXPR inner->next [L1040] COND TRUE !(((void*)0) != inner->next) [L1040] CALL reach_error() [L992] COND FALSE !(0) [L992] __assert_fail ("0", "dll-01-1.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 181 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 21.4s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 16.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2178 SDtfs, 3226 SDslu, 6157 SDs, 0 SdLazy, 4657 SolverSat, 314 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=247occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 13 MinimizatonAttempts, 905 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...