/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/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:10:36,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:10:36,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:10:36,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:10:36,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:10:36,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:10:36,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:10:36,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:10:36,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:10:36,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:10:36,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:10:36,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:10:36,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:10:36,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:10:36,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:10:36,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:10:36,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:10:36,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:10:36,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:10:36,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:10:36,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:10:36,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:10:36,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:10:36,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:10:36,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 18:10:36,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 18:10:36,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 18:10:36,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 18:10:36,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 18:10:36,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 18:10:36,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 18:10:36,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 18:10:36,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 18:10:36,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 18:10:36,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 18:10:36,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 18:10:36,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 18:10:36,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 18:10:36,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:10:36,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:10:36,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:10:36,824 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:10:36,850 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:10:36,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:10:36,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:10:36,855 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:10:36,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:10:36,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:10:36,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:10:36,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:10:36,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:10:36,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:10:36,858 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:10:36,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:10:36,858 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:10:36,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:10:36,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:10:36,859 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:10:36,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:10:36,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:10:36,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:10:36,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:10:36,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:10:36,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:10:36,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:10:37,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:10:37,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:10:37,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:10:37,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:10:37,334 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:10:37,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2021-02-23 18:10:37,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e07864ed6/84d8a175833440cda315c5c6ecf44041/FLAG9d8bc392b [2021-02-23 18:10:38,163 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:10:38,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2021-02-23 18:10:38,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e07864ed6/84d8a175833440cda315c5c6ecf44041/FLAG9d8bc392b [2021-02-23 18:10:38,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e07864ed6/84d8a175833440cda315c5c6ecf44041 [2021-02-23 18:10:38,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:10:38,412 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:10:38,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:10:38,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:10:38,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:10:38,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:10:38" (1/1) ... [2021-02-23 18:10:38,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ee89fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:38, skipping insertion in model container [2021-02-23 18:10:38,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:10:38" (1/1) ... [2021-02-23 18:10:38,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:10:38,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:10:38,900 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-02-23 18:10:38,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:10:38,922 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:10:38,991 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-02-23 18:10:38,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:10:39,062 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:10:39,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39 WrapperNode [2021-02-23 18:10:39,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:10:39,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:10:39,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:10:39,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:10:39,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:10:39,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:10:39,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:10:39,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:10:39,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (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 [2021-02-23 18:10:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:10:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:10:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:10:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-23 18:10:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-23 18:10:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-23 18:10:39,291 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-02-23 18:10:39,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:10:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:10:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:10:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 18:10:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 18:10:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:10:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:10:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:10:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-23 18:10:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-23 18:10:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-23 18:10:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-23 18:10:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-23 18:10:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-23 18:10:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-23 18:10:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-23 18:10:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-23 18:10:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-23 18:10:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-23 18:10:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-23 18:10:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-23 18:10:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-23 18:10:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-23 18:10:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-23 18:10:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-23 18:10:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-23 18:10:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-23 18:10:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-23 18:10:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-23 18:10:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-23 18:10:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-23 18:10:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-23 18:10:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-23 18:10:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-23 18:10:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-23 18:10:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-23 18:10:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-23 18:10:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-23 18:10:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-23 18:10:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-23 18:10:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-23 18:10:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-23 18:10:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-23 18:10:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-23 18:10:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-23 18:10:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-23 18:10:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-23 18:10:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-23 18:10:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-23 18:10:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-23 18:10:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-23 18:10:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-23 18:10:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-23 18:10:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-23 18:10:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-23 18:10:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-23 18:10:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-23 18:10:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-23 18:10:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-23 18:10:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-23 18:10:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 18:10:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 18:10:39,306 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-23 18:10:39,306 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 18:10:39,306 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-23 18:10:39,306 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-23 18:10:39,306 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-23 18:10:39,306 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-23 18:10:39,306 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-23 18:10:39,307 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-23 18:10:39,307 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-23 18:10:39,307 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-23 18:10:39,307 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 18:10:39,307 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-23 18:10:39,307 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-23 18:10:39,308 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-23 18:10:39,308 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-23 18:10:39,308 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-23 18:10:39,308 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-23 18:10:39,308 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-23 18:10:39,308 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-23 18:10:39,308 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-23 18:10:39,309 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-23 18:10:39,309 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-23 18:10:39,309 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-23 18:10:39,309 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-23 18:10:39,309 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-23 18:10:39,309 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-23 18:10:39,310 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-23 18:10:39,310 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-23 18:10:39,310 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-23 18:10:39,310 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-23 18:10:39,310 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-23 18:10:39,310 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-23 18:10:39,310 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-23 18:10:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-23 18:10:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-23 18:10:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-23 18:10:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-23 18:10:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-23 18:10:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-23 18:10:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-23 18:10:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-23 18:10:39,312 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-23 18:10:39,312 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-23 18:10:39,312 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-23 18:10:39,312 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-23 18:10:39,312 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-23 18:10:39,312 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-23 18:10:39,312 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-23 18:10:39,313 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-23 18:10:39,313 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-23 18:10:39,313 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-23 18:10:39,313 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-02-23 18:10:39,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 18:10:39,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:10:39,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 18:10:39,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:10:39,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 18:10:39,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:10:39,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:10:39,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:10:39,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:10:39,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:10:39,649 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-23 18:10:39,942 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:10:39,943 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-23 18:10:39,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:10:39 BoogieIcfgContainer [2021-02-23 18:10:39,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:10:39,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:10:39,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:10:39,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:10:39,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:10:38" (1/3) ... [2021-02-23 18:10:39,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2002c7b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:10:39, skipping insertion in model container [2021-02-23 18:10:39,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (2/3) ... [2021-02-23 18:10:39,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2002c7b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:10:39, skipping insertion in model container [2021-02-23 18:10:39,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:10:39" (3/3) ... [2021-02-23 18:10:39,964 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2021-02-23 18:10:39,972 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:10:39,978 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:10:40,000 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:10:40,045 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:10:40,045 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:10:40,046 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:10:40,046 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:10:40,046 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:10:40,046 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:10:40,046 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:10:40,046 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:10:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2021-02-23 18:10:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-23 18:10:40,091 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:40,092 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] [2021-02-23 18:10:40,093 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:40,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:40,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1014847540, now seen corresponding path program 1 times [2021-02-23 18:10:40,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:40,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687859875] [2021-02-23 18:10:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:40,230 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:40,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:40,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:40,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:40,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:40,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:40,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:40,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:40,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:40,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:40,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 18:10:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:40,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:40,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:40,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:40,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:40,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687859875] [2021-02-23 18:10:40,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:40,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 18:10:40,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153498962] [2021-02-23 18:10:40,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 18:10:40,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:40,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 18:10:40,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:10:40,563 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 7 states. [2021-02-23 18:10:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:41,039 INFO L93 Difference]: Finished difference Result 195 states and 223 transitions. [2021-02-23 18:10:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 18:10:41,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2021-02-23 18:10:41,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:41,052 INFO L225 Difference]: With dead ends: 195 [2021-02-23 18:10:41,052 INFO L226 Difference]: Without dead ends: 116 [2021-02-23 18:10:41,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-23 18:10:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-02-23 18:10:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2021-02-23 18:10:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-02-23 18:10:41,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-02-23 18:10:41,112 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 36 [2021-02-23 18:10:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:41,113 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-02-23 18:10:41,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 18:10:41,113 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-02-23 18:10:41,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-23 18:10:41,122 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:41,122 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] [2021-02-23 18:10:41,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:10:41,123 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:41,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:41,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1257517353, now seen corresponding path program 1 times [2021-02-23 18:10:41,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:41,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120277635] [2021-02-23 18:10:41,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:41,202 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:41,208 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:41,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:41,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:41,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:41,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:41,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:41,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 18:10:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:41,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:41,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:41,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:41,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:41,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120277635] [2021-02-23 18:10:41,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:41,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 18:10:41,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702257538] [2021-02-23 18:10:41,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 18:10:41,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:41,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 18:10:41,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:10:41,468 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 9 states. [2021-02-23 18:10:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:41,920 INFO L93 Difference]: Finished difference Result 197 states and 217 transitions. [2021-02-23 18:10:41,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 18:10:41,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2021-02-23 18:10:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:41,923 INFO L225 Difference]: With dead ends: 197 [2021-02-23 18:10:41,924 INFO L226 Difference]: Without dead ends: 137 [2021-02-23 18:10:41,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-02-23 18:10:41,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-23 18:10:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 118. [2021-02-23 18:10:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-02-23 18:10:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2021-02-23 18:10:41,944 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 55 [2021-02-23 18:10:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:41,944 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2021-02-23 18:10:41,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 18:10:41,944 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2021-02-23 18:10:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-02-23 18:10:41,947 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:41,948 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:41,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:10:41,948 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:41,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:41,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2021621228, now seen corresponding path program 2 times [2021-02-23 18:10:41,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:41,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292122878] [2021-02-23 18:10:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:42,030 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:42,036 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:42,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:42,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 18:10:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:42,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:10:42,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:10:42,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:10:42,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:42,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292122878] [2021-02-23 18:10:42,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:42,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 18:10:42,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234804874] [2021-02-23 18:10:42,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 18:10:42,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:42,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 18:10:42,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:10:42,274 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand 7 states. [2021-02-23 18:10:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:42,586 INFO L93 Difference]: Finished difference Result 199 states and 219 transitions. [2021-02-23 18:10:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:10:42,587 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2021-02-23 18:10:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:42,588 INFO L225 Difference]: With dead ends: 199 [2021-02-23 18:10:42,589 INFO L226 Difference]: Without dead ends: 118 [2021-02-23 18:10:42,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:10:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-02-23 18:10:42,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-02-23 18:10:42,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-02-23 18:10:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2021-02-23 18:10:42,606 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 74 [2021-02-23 18:10:42,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:42,607 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2021-02-23 18:10:42,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 18:10:42,607 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2021-02-23 18:10:42,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-02-23 18:10:42,608 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:42,609 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:42,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:10:42,609 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:42,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:42,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1186913634, now seen corresponding path program 1 times [2021-02-23 18:10:42,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:42,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171075714] [2021-02-23 18:10:42,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:42,774 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:42,780 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:42,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:42,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:42,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 18:10:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:42,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:42,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:42,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:42,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:42,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:42,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:43,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171075714] [2021-02-23 18:10:43,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:43,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 18:10:43,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904648929] [2021-02-23 18:10:43,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 18:10:43,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:43,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 18:10:43,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-23 18:10:43,041 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 11 states. [2021-02-23 18:10:43,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:43,485 INFO L93 Difference]: Finished difference Result 218 states and 237 transitions. [2021-02-23 18:10:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 18:10:43,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2021-02-23 18:10:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:43,493 INFO L225 Difference]: With dead ends: 218 [2021-02-23 18:10:43,494 INFO L226 Difference]: Without dead ends: 158 [2021-02-23 18:10:43,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-02-23 18:10:43,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-23 18:10:43,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2021-02-23 18:10:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-02-23 18:10:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2021-02-23 18:10:43,521 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 75 [2021-02-23 18:10:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:43,522 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2021-02-23 18:10:43,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 18:10:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2021-02-23 18:10:43,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-23 18:10:43,524 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:43,524 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:43,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:10:43,524 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:43,527 INFO L82 PathProgramCache]: Analyzing trace with hash 896284781, now seen corresponding path program 2 times [2021-02-23 18:10:43,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:43,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011452897] [2021-02-23 18:10:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:43,757 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:43,765 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:43,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:43,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:43,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:43,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:43,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:43,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 18:10:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:43,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:43,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:44,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:44,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:44,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:44,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:44,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:44,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:44,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011452897] [2021-02-23 18:10:44,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:44,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 18:10:44,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840640575] [2021-02-23 18:10:44,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 18:10:44,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:44,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 18:10:44,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-02-23 18:10:44,131 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand 13 states. [2021-02-23 18:10:44,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:44,595 INFO L93 Difference]: Finished difference Result 239 states and 259 transitions. [2021-02-23 18:10:44,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 18:10:44,595 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 95 [2021-02-23 18:10:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:44,597 INFO L225 Difference]: With dead ends: 239 [2021-02-23 18:10:44,597 INFO L226 Difference]: Without dead ends: 179 [2021-02-23 18:10:44,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-02-23 18:10:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-02-23 18:10:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 160. [2021-02-23 18:10:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-02-23 18:10:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 172 transitions. [2021-02-23 18:10:44,619 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 172 transitions. Word has length 95 [2021-02-23 18:10:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:44,619 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 172 transitions. [2021-02-23 18:10:44,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 18:10:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 172 transitions. [2021-02-23 18:10:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-02-23 18:10:44,621 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:44,621 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:44,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 18:10:44,622 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:44,622 INFO L82 PathProgramCache]: Analyzing trace with hash -177168392, now seen corresponding path program 3 times [2021-02-23 18:10:44,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:44,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426531901] [2021-02-23 18:10:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:44,884 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:44,891 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:44,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:44,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:44,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:44,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:44,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:44,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 18:10:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:45,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:45,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:45,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:45,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:45,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:45,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:45,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,185 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:45,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:45,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:45,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:45,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426531901] [2021-02-23 18:10:45,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:45,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-23 18:10:45,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469551443] [2021-02-23 18:10:45,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 18:10:45,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:45,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 18:10:45,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-23 18:10:45,295 INFO L87 Difference]: Start difference. First operand 160 states and 172 transitions. Second operand 15 states. [2021-02-23 18:10:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:45,946 INFO L93 Difference]: Finished difference Result 260 states and 281 transitions. [2021-02-23 18:10:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 18:10:45,946 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 115 [2021-02-23 18:10:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:45,949 INFO L225 Difference]: With dead ends: 260 [2021-02-23 18:10:45,949 INFO L226 Difference]: Without dead ends: 200 [2021-02-23 18:10:45,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-02-23 18:10:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-02-23 18:10:45,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 181. [2021-02-23 18:10:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-02-23 18:10:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 194 transitions. [2021-02-23 18:10:45,973 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 194 transitions. Word has length 115 [2021-02-23 18:10:45,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:45,973 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 194 transitions. [2021-02-23 18:10:45,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 18:10:45,974 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 194 transitions. [2021-02-23 18:10:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-02-23 18:10:45,975 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:45,975 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:45,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 18:10:45,976 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:45,977 INFO L82 PathProgramCache]: Analyzing trace with hash -313994237, now seen corresponding path program 4 times [2021-02-23 18:10:45,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:45,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414341630] [2021-02-23 18:10:45,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:46,209 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:46,217 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:46,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:46,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:46,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:46,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:46,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 18:10:46,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:46,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:46,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:46,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 18:10:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:46,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:46,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:46,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:46,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:46,558 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:10:46,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:10:46,593 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:10:46,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:46,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:10:46,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:46,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:46,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:46,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:46,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:46,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:46,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414341630] [2021-02-23 18:10:46,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:46,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 18:10:46,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968823373] [2021-02-23 18:10:46,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 18:10:46,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:46,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 18:10:46,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-02-23 18:10:46,850 INFO L87 Difference]: Start difference. First operand 181 states and 194 transitions. Second operand 17 states. [2021-02-23 18:10:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:47,968 INFO L93 Difference]: Finished difference Result 312 states and 338 transitions. [2021-02-23 18:10:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 18:10:47,968 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2021-02-23 18:10:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:47,970 INFO L225 Difference]: With dead ends: 312 [2021-02-23 18:10:47,970 INFO L226 Difference]: Without dead ends: 257 [2021-02-23 18:10:47,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2021-02-23 18:10:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-02-23 18:10:48,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 187. [2021-02-23 18:10:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-02-23 18:10:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 201 transitions. [2021-02-23 18:10:48,006 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 201 transitions. Word has length 135 [2021-02-23 18:10:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:48,007 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 201 transitions. [2021-02-23 18:10:48,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 18:10:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 201 transitions. [2021-02-23 18:10:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-02-23 18:10:48,009 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:48,009 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:48,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 18:10:48,010 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:48,011 INFO L82 PathProgramCache]: Analyzing trace with hash -696625984, now seen corresponding path program 1 times [2021-02-23 18:10:48,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:48,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127570943] [2021-02-23 18:10:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:48,256 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:48,264 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:48,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:48,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:10:48,430 WARN L141 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size [2021-02-23 18:10:48,431 WARN L147 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size 13 [2021-02-23 18:10:48,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:48,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 18:10:48,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 18:10:48,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:48,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:48,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:48,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 18:10:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:48,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:48,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:48,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:48,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:48,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:10:48,679 WARN L141 QuantifierPusher]: treesize reduction 5, result has 61.5 percent of original size [2021-02-23 18:10:48,679 WARN L147 QuantifierPusher]: treesize reduction 5, result has 61.5 percent of original size 8 [2021-02-23 18:10:48,698 WARN L141 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size [2021-02-23 18:10:48,699 WARN L147 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size 17 [2021-02-23 18:10:48,725 WARN L141 QuantifierPusher]: treesize reduction 5, result has 81.5 percent of original size [2021-02-23 18:10:48,727 WARN L147 QuantifierPusher]: treesize reduction 5, result has 81.5 percent of original size 22 [2021-02-23 18:10:48,750 WARN L141 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size [2021-02-23 18:10:48,751 WARN L147 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size 17 [2021-02-23 18:10:48,753 WARN L141 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size [2021-02-23 18:10:48,755 WARN L147 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size 17 [2021-02-23 18:10:48,756 WARN L141 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size [2021-02-23 18:10:48,757 WARN L147 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size 17 [2021-02-23 18:10:48,758 WARN L141 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size [2021-02-23 18:10:48,759 WARN L147 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size 13 [2021-02-23 18:10:48,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:10:48,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:10:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:48,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127570943] [2021-02-23 18:10:48,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:48,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-23 18:10:48,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342669528] [2021-02-23 18:10:48,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 18:10:48,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:48,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 18:10:48,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-02-23 18:10:48,924 INFO L87 Difference]: Start difference. First operand 187 states and 201 transitions. Second operand 18 states. [2021-02-23 18:10:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:50,242 INFO L93 Difference]: Finished difference Result 290 states and 314 transitions. [2021-02-23 18:10:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-23 18:10:50,242 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 137 [2021-02-23 18:10:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:50,244 INFO L225 Difference]: With dead ends: 290 [2021-02-23 18:10:50,245 INFO L226 Difference]: Without dead ends: 235 [2021-02-23 18:10:50,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 18:10:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-02-23 18:10:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 191. [2021-02-23 18:10:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-02-23 18:10:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 205 transitions. [2021-02-23 18:10:50,277 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 205 transitions. Word has length 137 [2021-02-23 18:10:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:50,277 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 205 transitions. [2021-02-23 18:10:50,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 18:10:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 205 transitions. [2021-02-23 18:10:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-02-23 18:10:50,279 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:50,279 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:50,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 18:10:50,280 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:50,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:50,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1130029170, now seen corresponding path program 1 times [2021-02-23 18:10:50,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:50,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503739883] [2021-02-23 18:10:50,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:50,519 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:50,528 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:50,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:50,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:50,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:50,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:50,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 18:10:50,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:50,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:50,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:50,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 18:10:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:50,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:50,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:50,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:50,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:50,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:10:50,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:10:50,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:10:50,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:50,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:10:50,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:50,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:50,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:50,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:50,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:50,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:51,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503739883] [2021-02-23 18:10:51,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:51,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 18:10:51,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130092291] [2021-02-23 18:10:51,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 18:10:51,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:51,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 18:10:51,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-02-23 18:10:51,119 INFO L87 Difference]: Start difference. First operand 191 states and 205 transitions. Second operand 17 states. [2021-02-23 18:10:52,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:52,035 INFO L93 Difference]: Finished difference Result 285 states and 305 transitions. [2021-02-23 18:10:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 18:10:52,035 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 139 [2021-02-23 18:10:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:52,037 INFO L225 Difference]: With dead ends: 285 [2021-02-23 18:10:52,037 INFO L226 Difference]: Without dead ends: 257 [2021-02-23 18:10:52,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2021-02-23 18:10:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-02-23 18:10:52,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 199. [2021-02-23 18:10:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-02-23 18:10:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 213 transitions. [2021-02-23 18:10:52,094 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 213 transitions. Word has length 139 [2021-02-23 18:10:52,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:52,094 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 213 transitions. [2021-02-23 18:10:52,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 18:10:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 213 transitions. [2021-02-23 18:10:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-02-23 18:10:52,096 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:52,097 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:52,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 18:10:52,097 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:52,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:52,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1346712291, now seen corresponding path program 1 times [2021-02-23 18:10:52,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:52,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369923240] [2021-02-23 18:10:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:52,320 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:52,331 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:10:52,408 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:10:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:10:52,483 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:10:52,560 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:10:52,561 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:10:52,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 18:10:52,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:10:52 BoogieIcfgContainer [2021-02-23 18:10:52,587 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:10:52,588 INFO L168 Benchmark]: Toolchain (without parser) took 14188.24 ms. Allocated memory was 167.8 MB in the beginning and 386.9 MB in the end (delta: 219.2 MB). Free memory was 142.5 MB in the beginning and 291.3 MB in the end (delta: -148.8 MB). Peak memory consumption was 71.7 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:52,589 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 167.8 MB. Free memory is still 141.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:10:52,589 INFO L168 Benchmark]: CACSL2BoogieTranslator took 647.31 ms. Allocated memory is still 167.8 MB. Free memory was 141.4 MB in the beginning and 119.4 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:52,589 INFO L168 Benchmark]: Boogie Preprocessor took 76.24 ms. Allocated memory is still 167.8 MB. Free memory was 119.4 MB in the beginning and 116.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:52,590 INFO L168 Benchmark]: RCFGBuilder took 805.18 ms. Allocated memory is still 167.8 MB. Free memory was 116.5 MB in the beginning and 101.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:52,590 INFO L168 Benchmark]: TraceAbstraction took 12639.07 ms. Allocated memory was 167.8 MB in the beginning and 386.9 MB in the end (delta: 219.2 MB). Free memory was 101.4 MB in the beginning and 291.3 MB in the end (delta: -190.0 MB). Peak memory consumption was 30.8 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:52,592 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 167.8 MB. Free memory is still 141.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 647.31 ms. Allocated memory is still 167.8 MB. Free memory was 141.4 MB in the beginning and 119.4 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.24 ms. Allocated memory is still 167.8 MB. Free memory was 119.4 MB in the beginning and 116.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 805.18 ms. Allocated memory is still 167.8 MB. Free memory was 116.5 MB in the beginning and 101.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12639.07 ms. Allocated memory was 167.8 MB in the beginning and 386.9 MB in the end (delta: 219.2 MB). Free memory was 101.4 MB in the beginning and 291.3 MB in the end (delta: -190.0 MB). Peak memory consumption was 30.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 616]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L599] const int len = 5; [L600] CALL, EXPR dll_create(len) [L579] DLL head = ((void *)0); [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND FALSE !(\read(head)) [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND FALSE !(len > 0) [L596] return head; [L600] RET, EXPR dll_create(len) [L600] DLL head = dll_create(len); [L601] head->next [L601] COND TRUE head->next [L602] EXPR head->data_0 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] EXPR head->data_1 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] EXPR head->data_2 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L616] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 122 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.5s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 868 SDtfs, 1368 SDslu, 6107 SDs, 0 SdLazy, 3386 SolverSat, 231 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 255 GetRequests, 57 SyntacticMatches, 11 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 267 StatesRemovedByMinimization, 8 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...