/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:38:58,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:38:58,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:38:58,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:38:58,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:38:58,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:38:58,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:38:58,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:38:58,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:38:58,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:38:58,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:38:58,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:38:58,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:38:58,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:38:58,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:38:58,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:38:58,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:38:58,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:38:58,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:38:58,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:38:58,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:38:58,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:38:58,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:38:58,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:38:58,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 20:38:58,734 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 20:38:58,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 20:38:58,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 20:38:58,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 20:38:58,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 20:38:58,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 20:38:58,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 20:38:58,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 20:38:58,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 20:38:58,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 20:38:58,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 20:38:58,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 20:38:58,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 20:38:58,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:38:58,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:38:58,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:38:58,749 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:38:58,762 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:38:58,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:38:58,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:38:58,765 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:38:58,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:38:58,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:38:58,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:38:58,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:38:58,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:38:58,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:38:58,767 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:38:58,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:38:58,767 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:38:58,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:38:58,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:38:58,768 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:38:58,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:38:58,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:38:58,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:38:58,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:38:58,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:38:58,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:38:58,770 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:38:59,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:38:59,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:38:59,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:38:59,208 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:38:59,209 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:38:59,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-10-23 20:38:59,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b2349435/7f759ee01c014a82a051f8e5499a6e28/FLAG550e448f1 [2020-10-23 20:39:00,030 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:39:00,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-10-23 20:39:00,051 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b2349435/7f759ee01c014a82a051f8e5499a6e28/FLAG550e448f1 [2020-10-23 20:39:00,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b2349435/7f759ee01c014a82a051f8e5499a6e28 [2020-10-23 20:39:00,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:39:00,300 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:39:00,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:39:00,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:39:00,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:39:00,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:39:00" (1/1) ... [2020-10-23 20:39:00,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5947d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:00, skipping insertion in model container [2020-10-23 20:39:00,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:39:00" (1/1) ... [2020-10-23 20:39:00,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:39:00,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:39:00,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:39:00,771 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:39:00,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:39:00,895 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:39:00,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:00 WrapperNode [2020-10-23 20:39:00,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:39:00,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:39:00,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:39:00,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:39:00,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:00" (1/1) ... [2020-10-23 20:39:00,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:00" (1/1) ... [2020-10-23 20:39:00,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:00" (1/1) ... [2020-10-23 20:39:00,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:00" (1/1) ... [2020-10-23 20:39:00,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:00" (1/1) ... [2020-10-23 20:39:00,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:00" (1/1) ... [2020-10-23 20:39:00,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:00" (1/1) ... [2020-10-23 20:39:00,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:39:00,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:39:00,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:39:00,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:39:00,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:39:01,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:39:01,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:39:01,075 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:39:01,075 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:39:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 20:39:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 20:39:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 20:39:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 20:39:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 20:39:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 20:39:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 20:39:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 20:39:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 20:39:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 20:39:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 20:39:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 20:39:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 20:39:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 20:39:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 20:39:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 20:39:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 20:39:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 20:39:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 20:39:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 20:39:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 20:39:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 20:39:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 20:39:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 20:39:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 20:39:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 20:39:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 20:39:01,080 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 20:39:01,080 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 20:39:01,080 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 20:39:01,080 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 20:39:01,080 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 20:39:01,080 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 20:39:01,081 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 20:39:01,081 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 20:39:01,081 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 20:39:01,081 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 20:39:01,081 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 20:39:01,081 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 20:39:01,081 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 20:39:01,082 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 20:39:01,082 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 20:39:01,082 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 20:39:01,082 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 20:39:01,082 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 20:39:01,082 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 20:39:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 20:39:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 20:39:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 20:39:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 20:39:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 20:39:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 20:39:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 20:39:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 20:39:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 20:39:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 20:39:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 20:39:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 20:39:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 20:39:01,085 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:39:01,085 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 20:39:01,085 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 20:39:01,085 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 20:39:01,085 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 20:39:01,085 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 20:39:01,085 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 20:39:01,086 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 20:39:01,086 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 20:39:01,086 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 20:39:01,086 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 20:39:01,086 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 20:39:01,086 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 20:39:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 20:39:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 20:39:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 20:39:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 20:39:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 20:39:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 20:39:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 20:39:01,088 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 20:39:01,088 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 20:39:01,088 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 20:39:01,088 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 20:39:01,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 20:39:01,089 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 20:39:01,089 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 20:39:01,089 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 20:39:01,089 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 20:39:01,089 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 20:39:01,089 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 20:39:01,089 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 20:39:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 20:39:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 20:39:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 20:39:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 20:39:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 20:39:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 20:39:01,090 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 20:39:01,091 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 20:39:01,091 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 20:39:01,091 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 20:39:01,091 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 20:39:01,091 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 20:39:01,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:39:01,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:39:01,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 20:39:01,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 20:39:01,092 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:39:01,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:39:01,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:39:01,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 20:39:01,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 20:39:01,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 20:39:01,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:39:01,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:39:01,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:39:01,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:39:01,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:39:01,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:39:01,993 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:39:01,993 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-10-23 20:39:01,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:39:01 BoogieIcfgContainer [2020-10-23 20:39:01,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:39:02,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:39:02,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:39:02,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:39:02,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:39:00" (1/3) ... [2020-10-23 20:39:02,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6fdf5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:39:02, skipping insertion in model container [2020-10-23 20:39:02,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:00" (2/3) ... [2020-10-23 20:39:02,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6fdf5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:39:02, skipping insertion in model container [2020-10-23 20:39:02,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:39:01" (3/3) ... [2020-10-23 20:39:02,012 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2020-10-23 20:39:02,026 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:39:02,034 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:39:02,050 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:39:02,085 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:39:02,085 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:39:02,085 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:39:02,085 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:39:02,085 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:39:02,087 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:39:02,088 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:39:02,091 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:39:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-10-23 20:39:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 20:39:02,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:02,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:02,162 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:02,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:02,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1609758844, now seen corresponding path program 1 times [2020-10-23 20:39:02,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:02,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929595656] [2020-10-23 20:39:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:02,273 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:02,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:02,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929595656] [2020-10-23 20:39:02,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:02,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 20:39:02,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7388335] [2020-10-23 20:39:02,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 20:39:02,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:02,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 20:39:02,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:39:02,508 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 5 states. [2020-10-23 20:39:02,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:02,976 INFO L93 Difference]: Finished difference Result 358 states and 505 transitions. [2020-10-23 20:39:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 20:39:02,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-23 20:39:02,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:02,991 INFO L225 Difference]: With dead ends: 358 [2020-10-23 20:39:02,991 INFO L226 Difference]: Without dead ends: 186 [2020-10-23 20:39:02,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:39:03,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-23 20:39:03,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-23 20:39:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-23 20:39:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2020-10-23 20:39:03,067 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 18 [2020-10-23 20:39:03,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:03,090 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2020-10-23 20:39:03,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 20:39:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2020-10-23 20:39:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 20:39:03,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:03,095 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] [2020-10-23 20:39:03,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:39:03,096 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:03,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1384880224, now seen corresponding path program 1 times [2020-10-23 20:39:03,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:03,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409783863] [2020-10-23 20:39:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:03,117 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:03,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:03,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409783863] [2020-10-23 20:39:03,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:03,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:39:03,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907200003] [2020-10-23 20:39:03,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:39:03,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:03,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:39:03,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:39:03,254 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand 4 states. [2020-10-23 20:39:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:03,571 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2020-10-23 20:39:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:39:03,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-23 20:39:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:03,574 INFO L225 Difference]: With dead ends: 167 [2020-10-23 20:39:03,574 INFO L226 Difference]: Without dead ends: 160 [2020-10-23 20:39:03,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:39:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-23 20:39:03,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-23 20:39:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-23 20:39:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 181 transitions. [2020-10-23 20:39:03,598 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 181 transitions. Word has length 30 [2020-10-23 20:39:03,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:03,599 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 181 transitions. [2020-10-23 20:39:03,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:39:03,599 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 181 transitions. [2020-10-23 20:39:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 20:39:03,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:03,600 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] [2020-10-23 20:39:03,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:39:03,600 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:03,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1492035453, now seen corresponding path program 1 times [2020-10-23 20:39:03,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:03,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066056159] [2020-10-23 20:39:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:03,616 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:03,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:03,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066056159] [2020-10-23 20:39:03,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:03,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:39:03,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834232732] [2020-10-23 20:39:03,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:39:03,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:03,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:39:03,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:39:03,793 INFO L87 Difference]: Start difference. First operand 160 states and 181 transitions. Second operand 8 states. [2020-10-23 20:39:04,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:04,433 INFO L93 Difference]: Finished difference Result 248 states and 283 transitions. [2020-10-23 20:39:04,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:39:04,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-23 20:39:04,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:04,436 INFO L225 Difference]: With dead ends: 248 [2020-10-23 20:39:04,436 INFO L226 Difference]: Without dead ends: 241 [2020-10-23 20:39:04,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:39:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-23 20:39:04,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 155. [2020-10-23 20:39:04,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-23 20:39:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2020-10-23 20:39:04,462 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 32 [2020-10-23 20:39:04,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:04,463 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2020-10-23 20:39:04,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:39:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2020-10-23 20:39:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-23 20:39:04,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:04,465 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] [2020-10-23 20:39:04,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:39:04,465 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:04,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:04,466 INFO L82 PathProgramCache]: Analyzing trace with hash -66764841, now seen corresponding path program 1 times [2020-10-23 20:39:04,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:04,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986149099] [2020-10-23 20:39:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:04,471 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:04,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:04,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986149099] [2020-10-23 20:39:04,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:04,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:39:04,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060292079] [2020-10-23 20:39:04,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:39:04,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:04,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:39:04,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:39:04,579 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand 6 states. [2020-10-23 20:39:05,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:05,119 INFO L93 Difference]: Finished difference Result 362 states and 415 transitions. [2020-10-23 20:39:05,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:39:05,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-10-23 20:39:05,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:05,122 INFO L225 Difference]: With dead ends: 362 [2020-10-23 20:39:05,122 INFO L226 Difference]: Without dead ends: 241 [2020-10-23 20:39:05,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:39:05,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-23 20:39:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 158. [2020-10-23 20:39:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-23 20:39:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 178 transitions. [2020-10-23 20:39:05,147 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 178 transitions. Word has length 38 [2020-10-23 20:39:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:05,148 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 178 transitions. [2020-10-23 20:39:05,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:39:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 178 transitions. [2020-10-23 20:39:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 20:39:05,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:05,150 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] [2020-10-23 20:39:05,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:39:05,150 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:05,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1112940044, now seen corresponding path program 1 times [2020-10-23 20:39:05,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:05,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381027368] [2020-10-23 20:39:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:05,156 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:05,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:05,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381027368] [2020-10-23 20:39:05,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:05,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:39:05,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330917385] [2020-10-23 20:39:05,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:39:05,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:05,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:39:05,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:39:05,290 INFO L87 Difference]: Start difference. First operand 158 states and 178 transitions. Second operand 6 states. [2020-10-23 20:39:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:05,720 INFO L93 Difference]: Finished difference Result 260 states and 296 transitions. [2020-10-23 20:39:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:39:05,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-10-23 20:39:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:05,723 INFO L225 Difference]: With dead ends: 260 [2020-10-23 20:39:05,723 INFO L226 Difference]: Without dead ends: 229 [2020-10-23 20:39:05,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:39:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-23 20:39:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 158. [2020-10-23 20:39:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-23 20:39:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2020-10-23 20:39:05,748 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 40 [2020-10-23 20:39:05,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:05,748 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2020-10-23 20:39:05,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:39:05,748 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2020-10-23 20:39:05,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 20:39:05,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:05,750 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] [2020-10-23 20:39:05,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:39:05,750 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:05,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:05,751 INFO L82 PathProgramCache]: Analyzing trace with hash 232926315, now seen corresponding path program 1 times [2020-10-23 20:39:05,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:05,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368822622] [2020-10-23 20:39:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:05,756 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:05,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:05,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368822622] [2020-10-23 20:39:05,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:05,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:39:05,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522733551] [2020-10-23 20:39:05,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:39:05,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:05,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:39:05,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:39:05,847 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand 7 states. [2020-10-23 20:39:06,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:06,650 INFO L93 Difference]: Finished difference Result 238 states and 269 transitions. [2020-10-23 20:39:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:39:06,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-23 20:39:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:06,655 INFO L225 Difference]: With dead ends: 238 [2020-10-23 20:39:06,655 INFO L226 Difference]: Without dead ends: 233 [2020-10-23 20:39:06,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-23 20:39:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-23 20:39:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 156. [2020-10-23 20:39:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-23 20:39:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 173 transitions. [2020-10-23 20:39:06,694 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 173 transitions. Word has length 44 [2020-10-23 20:39:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:06,695 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 173 transitions. [2020-10-23 20:39:06,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:39:06,695 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 173 transitions. [2020-10-23 20:39:06,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-23 20:39:06,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:06,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:06,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:39:06,698 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:06,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:06,698 INFO L82 PathProgramCache]: Analyzing trace with hash 439633619, now seen corresponding path program 1 times [2020-10-23 20:39:06,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:06,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936929601] [2020-10-23 20:39:06,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:06,703 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:06,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:06,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936929601] [2020-10-23 20:39:06,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:06,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:39:06,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62668595] [2020-10-23 20:39:06,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:39:06,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:06,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:39:06,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:39:06,766 INFO L87 Difference]: Start difference. First operand 156 states and 173 transitions. Second operand 4 states. [2020-10-23 20:39:07,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:07,108 INFO L93 Difference]: Finished difference Result 259 states and 295 transitions. [2020-10-23 20:39:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:39:07,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-23 20:39:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:07,111 INFO L225 Difference]: With dead ends: 259 [2020-10-23 20:39:07,111 INFO L226 Difference]: Without dead ends: 192 [2020-10-23 20:39:07,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:39:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-23 20:39:07,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 159. [2020-10-23 20:39:07,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-23 20:39:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2020-10-23 20:39:07,145 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 48 [2020-10-23 20:39:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:07,145 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2020-10-23 20:39:07,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:39:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2020-10-23 20:39:07,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-23 20:39:07,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:07,153 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] [2020-10-23 20:39:07,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 20:39:07,154 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:07,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:07,154 INFO L82 PathProgramCache]: Analyzing trace with hash 824217848, now seen corresponding path program 1 times [2020-10-23 20:39:07,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:07,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109028014] [2020-10-23 20:39:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:07,163 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:07,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:07,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109028014] [2020-10-23 20:39:07,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:07,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:39:07,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89809349] [2020-10-23 20:39:07,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:39:07,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:07,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:39:07,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:39:07,236 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand 4 states. [2020-10-23 20:39:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:07,559 INFO L93 Difference]: Finished difference Result 162 states and 179 transitions. [2020-10-23 20:39:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:39:07,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-23 20:39:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:07,561 INFO L225 Difference]: With dead ends: 162 [2020-10-23 20:39:07,562 INFO L226 Difference]: Without dead ends: 158 [2020-10-23 20:39:07,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:39:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-23 20:39:07,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-23 20:39:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-23 20:39:07,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 175 transitions. [2020-10-23 20:39:07,595 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 175 transitions. Word has length 50 [2020-10-23 20:39:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:07,596 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 175 transitions. [2020-10-23 20:39:07,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:39:07,596 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 175 transitions. [2020-10-23 20:39:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-23 20:39:07,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:07,605 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] [2020-10-23 20:39:07,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 20:39:07,605 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:07,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:07,606 INFO L82 PathProgramCache]: Analyzing trace with hash -817730258, now seen corresponding path program 1 times [2020-10-23 20:39:07,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:07,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129507633] [2020-10-23 20:39:07,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:07,614 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:07,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:07,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129507633] [2020-10-23 20:39:07,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:07,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:39:07,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021924024] [2020-10-23 20:39:07,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:39:07,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:07,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:39:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:39:07,818 INFO L87 Difference]: Start difference. First operand 158 states and 175 transitions. Second operand 9 states. [2020-10-23 20:39:08,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:08,649 INFO L93 Difference]: Finished difference Result 345 states and 390 transitions. [2020-10-23 20:39:08,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 20:39:08,650 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-10-23 20:39:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:08,652 INFO L225 Difference]: With dead ends: 345 [2020-10-23 20:39:08,652 INFO L226 Difference]: Without dead ends: 276 [2020-10-23 20:39:08,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:39:08,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-23 20:39:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 177. [2020-10-23 20:39:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-23 20:39:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 195 transitions. [2020-10-23 20:39:08,684 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 195 transitions. Word has length 54 [2020-10-23 20:39:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:08,686 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 195 transitions. [2020-10-23 20:39:08,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:39:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 195 transitions. [2020-10-23 20:39:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-23 20:39:08,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:08,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:08,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 20:39:08,689 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:08,689 INFO L82 PathProgramCache]: Analyzing trace with hash -419961564, now seen corresponding path program 1 times [2020-10-23 20:39:08,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:08,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967852268] [2020-10-23 20:39:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:08,694 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:08,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:08,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967852268] [2020-10-23 20:39:08,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:08,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:39:08,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370452098] [2020-10-23 20:39:08,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:39:08,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:08,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:39:08,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:39:08,799 INFO L87 Difference]: Start difference. First operand 177 states and 195 transitions. Second operand 4 states. [2020-10-23 20:39:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:09,088 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2020-10-23 20:39:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:39:09,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-23 20:39:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:09,091 INFO L225 Difference]: With dead ends: 185 [2020-10-23 20:39:09,091 INFO L226 Difference]: Without dead ends: 178 [2020-10-23 20:39:09,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:39:09,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-23 20:39:09,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-23 20:39:09,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-23 20:39:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2020-10-23 20:39:09,119 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 58 [2020-10-23 20:39:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:09,119 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2020-10-23 20:39:09,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:39:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2020-10-23 20:39:09,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 20:39:09,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:09,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:09,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 20:39:09,121 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:09,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:09,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1529988056, now seen corresponding path program 1 times [2020-10-23 20:39:09,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:09,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387691874] [2020-10-23 20:39:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:09,259 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:09,263 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:09,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:09,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387691874] [2020-10-23 20:39:09,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:09,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:39:09,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354951951] [2020-10-23 20:39:09,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:39:09,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:09,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:39:09,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:39:09,425 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand 8 states. [2020-10-23 20:39:10,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:10,017 INFO L93 Difference]: Finished difference Result 263 states and 293 transitions. [2020-10-23 20:39:10,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:39:10,018 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-23 20:39:10,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:10,020 INFO L225 Difference]: With dead ends: 263 [2020-10-23 20:39:10,020 INFO L226 Difference]: Without dead ends: 233 [2020-10-23 20:39:10,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:39:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-23 20:39:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2020-10-23 20:39:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-23 20:39:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2020-10-23 20:39:10,052 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 59 [2020-10-23 20:39:10,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:10,052 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2020-10-23 20:39:10,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:39:10,053 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2020-10-23 20:39:10,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 20:39:10,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:10,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:10,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 20:39:10,054 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:10,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:10,055 INFO L82 PathProgramCache]: Analyzing trace with hash 184861191, now seen corresponding path program 1 times [2020-10-23 20:39:10,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:10,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655169234] [2020-10-23 20:39:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:10,059 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:10,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:10,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655169234] [2020-10-23 20:39:10,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:10,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 20:39:10,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558196219] [2020-10-23 20:39:10,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 20:39:10,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:10,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 20:39:10,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-23 20:39:10,554 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand 14 states. [2020-10-23 20:39:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:13,030 INFO L93 Difference]: Finished difference Result 637 states and 723 transitions. [2020-10-23 20:39:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 20:39:13,033 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-23 20:39:13,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:13,037 INFO L225 Difference]: With dead ends: 637 [2020-10-23 20:39:13,038 INFO L226 Difference]: Without dead ends: 632 [2020-10-23 20:39:13,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 20:39:13,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2020-10-23 20:39:13,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 236. [2020-10-23 20:39:13,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-23 20:39:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 264 transitions. [2020-10-23 20:39:13,100 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 264 transitions. Word has length 59 [2020-10-23 20:39:13,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:13,100 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 264 transitions. [2020-10-23 20:39:13,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 20:39:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 264 transitions. [2020-10-23 20:39:13,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-23 20:39:13,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:13,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:13,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 20:39:13,102 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1994540127, now seen corresponding path program 1 times [2020-10-23 20:39:13,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:13,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721882815] [2020-10-23 20:39:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:13,108 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:13,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:13,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721882815] [2020-10-23 20:39:13,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:13,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:39:13,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566442877] [2020-10-23 20:39:13,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:39:13,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:13,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:39:13,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:39:13,238 INFO L87 Difference]: Start difference. First operand 236 states and 264 transitions. Second operand 8 states. [2020-10-23 20:39:13,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:13,932 INFO L93 Difference]: Finished difference Result 259 states and 288 transitions. [2020-10-23 20:39:13,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 20:39:13,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-23 20:39:13,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:13,935 INFO L225 Difference]: With dead ends: 259 [2020-10-23 20:39:13,936 INFO L226 Difference]: Without dead ends: 252 [2020-10-23 20:39:13,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:39:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-23 20:39:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 231. [2020-10-23 20:39:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-23 20:39:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 258 transitions. [2020-10-23 20:39:13,991 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 258 transitions. Word has length 60 [2020-10-23 20:39:13,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:13,991 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 258 transitions. [2020-10-23 20:39:13,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:39:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 258 transitions. [2020-10-23 20:39:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 20:39:13,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:13,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:13,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 20:39:13,993 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:13,994 INFO L82 PathProgramCache]: Analyzing trace with hash -215686495, now seen corresponding path program 1 times [2020-10-23 20:39:13,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:13,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483208694] [2020-10-23 20:39:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:14,004 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:14,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:14,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483208694] [2020-10-23 20:39:14,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:14,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 20:39:14,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609724162] [2020-10-23 20:39:14,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 20:39:14,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:14,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 20:39:14,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:39:14,525 INFO L87 Difference]: Start difference. First operand 231 states and 258 transitions. Second operand 15 states. [2020-10-23 20:39:17,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:17,305 INFO L93 Difference]: Finished difference Result 625 states and 708 transitions. [2020-10-23 20:39:17,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 20:39:17,306 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-23 20:39:17,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:17,311 INFO L225 Difference]: With dead ends: 625 [2020-10-23 20:39:17,311 INFO L226 Difference]: Without dead ends: 620 [2020-10-23 20:39:17,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 20:39:17,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-10-23 20:39:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 235. [2020-10-23 20:39:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-23 20:39:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 262 transitions. [2020-10-23 20:39:17,386 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 262 transitions. Word has length 63 [2020-10-23 20:39:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:17,386 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 262 transitions. [2020-10-23 20:39:17,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 20:39:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 262 transitions. [2020-10-23 20:39:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 20:39:17,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:17,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:17,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 20:39:17,388 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash -233861473, now seen corresponding path program 1 times [2020-10-23 20:39:17,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:17,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235505325] [2020-10-23 20:39:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:17,495 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:17,498 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:17,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:17,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235505325] [2020-10-23 20:39:17,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:17,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:39:17,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301609395] [2020-10-23 20:39:17,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:39:17,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:17,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:39:17,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:39:17,561 INFO L87 Difference]: Start difference. First operand 235 states and 262 transitions. Second operand 4 states. [2020-10-23 20:39:17,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:17,958 INFO L93 Difference]: Finished difference Result 243 states and 269 transitions. [2020-10-23 20:39:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:39:17,959 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-23 20:39:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:17,961 INFO L225 Difference]: With dead ends: 243 [2020-10-23 20:39:17,961 INFO L226 Difference]: Without dead ends: 239 [2020-10-23 20:39:17,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:39:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-23 20:39:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 234. [2020-10-23 20:39:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-23 20:39:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 260 transitions. [2020-10-23 20:39:18,021 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 260 transitions. Word has length 64 [2020-10-23 20:39:18,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:18,021 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 260 transitions. [2020-10-23 20:39:18,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:39:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 260 transitions. [2020-10-23 20:39:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-23 20:39:18,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:18,023 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:18,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 20:39:18,023 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:18,024 INFO L82 PathProgramCache]: Analyzing trace with hash 906480798, now seen corresponding path program 1 times [2020-10-23 20:39:18,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:18,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095131369] [2020-10-23 20:39:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:18,551 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:18,554 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:18,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:18,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095131369] [2020-10-23 20:39:18,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:18,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:39:18,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143243053] [2020-10-23 20:39:18,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:39:18,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:39:18,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:39:18,702 INFO L87 Difference]: Start difference. First operand 234 states and 260 transitions. Second operand 7 states. [2020-10-23 20:39:19,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:19,380 INFO L93 Difference]: Finished difference Result 378 states and 425 transitions. [2020-10-23 20:39:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:39:19,380 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-23 20:39:19,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:19,382 INFO L225 Difference]: With dead ends: 378 [2020-10-23 20:39:19,382 INFO L226 Difference]: Without dead ends: 271 [2020-10-23 20:39:19,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:39:19,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-23 20:39:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 234. [2020-10-23 20:39:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-23 20:39:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 258 transitions. [2020-10-23 20:39:19,452 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 258 transitions. Word has length 65 [2020-10-23 20:39:19,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:19,453 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 258 transitions. [2020-10-23 20:39:19,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:39:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 258 transitions. [2020-10-23 20:39:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-23 20:39:19,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:19,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:19,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 20:39:19,455 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:19,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:19,455 INFO L82 PathProgramCache]: Analyzing trace with hash 894248917, now seen corresponding path program 1 times [2020-10-23 20:39:19,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:19,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981764552] [2020-10-23 20:39:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:19,566 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:19,569 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:19,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:19,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981764552] [2020-10-23 20:39:19,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:19,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:39:19,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577066774] [2020-10-23 20:39:19,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:39:19,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:19,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:39:19,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:39:19,739 INFO L87 Difference]: Start difference. First operand 234 states and 258 transitions. Second operand 9 states. [2020-10-23 20:39:20,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:20,837 INFO L93 Difference]: Finished difference Result 490 states and 547 transitions. [2020-10-23 20:39:20,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 20:39:20,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-10-23 20:39:20,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:20,840 INFO L225 Difference]: With dead ends: 490 [2020-10-23 20:39:20,840 INFO L226 Difference]: Without dead ends: 422 [2020-10-23 20:39:20,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:39:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-23 20:39:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 320. [2020-10-23 20:39:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-23 20:39:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 357 transitions. [2020-10-23 20:39:20,935 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 357 transitions. Word has length 68 [2020-10-23 20:39:20,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:20,935 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 357 transitions. [2020-10-23 20:39:20,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:39:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 357 transitions. [2020-10-23 20:39:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-23 20:39:20,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:20,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:20,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 20:39:20,937 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:20,938 INFO L82 PathProgramCache]: Analyzing trace with hash -680181352, now seen corresponding path program 1 times [2020-10-23 20:39:20,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:20,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337426732] [2020-10-23 20:39:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:20,950 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:20,953 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:21,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:21,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337426732] [2020-10-23 20:39:21,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:21,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:39:21,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055496968] [2020-10-23 20:39:21,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:39:21,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:21,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:39:21,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:39:21,018 INFO L87 Difference]: Start difference. First operand 320 states and 357 transitions. Second operand 4 states. [2020-10-23 20:39:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:21,584 INFO L93 Difference]: Finished difference Result 560 states and 644 transitions. [2020-10-23 20:39:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:39:21,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-23 20:39:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:21,588 INFO L225 Difference]: With dead ends: 560 [2020-10-23 20:39:21,588 INFO L226 Difference]: Without dead ends: 426 [2020-10-23 20:39:21,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:39:21,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-23 20:39:21,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 369. [2020-10-23 20:39:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-23 20:39:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 415 transitions. [2020-10-23 20:39:21,720 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 415 transitions. Word has length 70 [2020-10-23 20:39:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:21,720 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 415 transitions. [2020-10-23 20:39:21,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:39:21,721 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 415 transitions. [2020-10-23 20:39:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-23 20:39:21,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:21,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:21,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 20:39:21,723 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:21,723 INFO L82 PathProgramCache]: Analyzing trace with hash -266651992, now seen corresponding path program 1 times [2020-10-23 20:39:21,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:21,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827524045] [2020-10-23 20:39:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:22,188 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:22,191 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:22,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:39:22,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827524045] [2020-10-23 20:39:22,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:22,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:39:22,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066104017] [2020-10-23 20:39:22,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:39:22,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:22,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:39:22,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:39:22,362 INFO L87 Difference]: Start difference. First operand 369 states and 415 transitions. Second operand 10 states. [2020-10-23 20:39:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:23,496 INFO L93 Difference]: Finished difference Result 600 states and 682 transitions. [2020-10-23 20:39:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 20:39:23,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-23 20:39:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:23,499 INFO L225 Difference]: With dead ends: 600 [2020-10-23 20:39:23,499 INFO L226 Difference]: Without dead ends: 539 [2020-10-23 20:39:23,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-10-23 20:39:23,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-10-23 20:39:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 416. [2020-10-23 20:39:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-23 20:39:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 470 transitions. [2020-10-23 20:39:23,651 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 470 transitions. Word has length 73 [2020-10-23 20:39:23,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:23,652 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 470 transitions. [2020-10-23 20:39:23,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:39:23,652 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 470 transitions. [2020-10-23 20:39:23,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-23 20:39:23,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:23,654 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:23,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 20:39:23,654 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:23,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:23,656 INFO L82 PathProgramCache]: Analyzing trace with hash -2064139585, now seen corresponding path program 1 times [2020-10-23 20:39:23,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:23,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768406644] [2020-10-23 20:39:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:23,799 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-23 20:39:23,971 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-23 20:39:24,255 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-23 20:39:24,426 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-23 20:39:24,597 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-23 20:39:24,639 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:24,642 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:39:24,662 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:39:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:39:24,680 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:39:24,722 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:39:24,722 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:39:24,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 20:39:24,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:39:24 BoogieIcfgContainer [2020-10-23 20:39:24,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:39:24,746 INFO L168 Benchmark]: Toolchain (without parser) took 24450.84 ms. Allocated memory was 151.0 MB in the beginning and 324.0 MB in the end (delta: 173.0 MB). Free memory was 126.6 MB in the beginning and 139.9 MB in the end (delta: -13.3 MB). Peak memory consumption was 160.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:39:24,746 INFO L168 Benchmark]: CDTParser took 1.10 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:39:24,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 588.98 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 103.3 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:39:24,747 INFO L168 Benchmark]: Boogie Preprocessor took 79.57 ms. Allocated memory is still 151.0 MB. Free memory was 103.3 MB in the beginning and 99.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-10-23 20:39:24,748 INFO L168 Benchmark]: RCFGBuilder took 1021.38 ms. Allocated memory is still 151.0 MB. Free memory was 99.9 MB in the beginning and 73.1 MB in the end (delta: 26.8 MB). Peak memory consumption was 27.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:39:24,748 INFO L168 Benchmark]: TraceAbstraction took 22742.34 ms. Allocated memory was 151.0 MB in the beginning and 324.0 MB in the end (delta: 173.0 MB). Free memory was 72.6 MB in the beginning and 139.9 MB in the end (delta: -67.3 MB). Peak memory consumption was 105.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:39:24,751 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.10 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 588.98 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 103.3 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 79.57 ms. Allocated memory is still 151.0 MB. Free memory was 103.3 MB in the beginning and 99.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1021.38 ms. Allocated memory is still 151.0 MB. Free memory was 99.9 MB in the beginning and 73.1 MB in the end (delta: 26.8 MB). Peak memory consumption was 27.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22742.34 ms. Allocated memory was 151.0 MB in the beginning and 324.0 MB in the end (delta: 173.0 MB). Free memory was 72.6 MB in the beginning and 139.9 MB in the end (delta: -67.3 MB). Peak memory consumption was 105.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 992]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1002] SLL* list = malloc(sizeof(SLL)); [L1003] list->next = ((void*)0) [L1004] COND FALSE !(!(list != ((void*)0))) [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1004] list->inner = malloc(sizeof(SLL)) [L1004] EXPR list->inner [L1004] list->inner->next = ((void*)0) [L1004] EXPR list->inner [L1004] list->inner->inner = ((void*)0) [L1004] EXPR list->inner [L1004] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L1004] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L1006] SLL* end = list; [L1009] COND FALSE !(__VERIFIER_nondet_int()) [L1019] end = ((void*)0) [L1020] end = list [L1023] COND FALSE !(!(((void*)0) != end)) [L1025] COND TRUE ((void*)0) != end [L1027] int len = 0; [L1028] EXPR end->inner [L1028] SLL* inner = end->inner; [L1029] COND TRUE ((void*)0) != inner [L1031] COND TRUE len == 0 [L1032] len = 1 [L1035] COND FALSE !(!(((void*)0) != inner)) [L1036] EXPR inner->inner [L1036] COND FALSE !(!(((void*)0) == inner->inner)) [L1037] EXPR inner->next [L1037] COND FALSE !(!(((void*)0) == inner->next)) [L1038] EXPR inner->inner [L1038] inner = inner->inner [L1039] COND TRUE len == 1 [L1040] EXPR inner->inner [L1040] inner = inner->inner [L1029] COND TRUE ((void*)0) != inner [L1031] COND FALSE !(len == 0) [L1034] len = 2 [L1035] COND FALSE !(!(((void*)0) != inner)) [L1036] EXPR inner->inner [L1036] COND TRUE !(((void*)0) == inner->inner) [L1036] CALL reach_error() [L992] COND FALSE !(0) [L992] __assert_fail ("0", "sll-01-2.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 181 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22.6s, OverallIterations: 20, TraceHistogramMax: 2, AutomataDifference: 15.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3286 SDtfs, 4604 SDslu, 10312 SDs, 0 SdLazy, 7153 SolverSat, 423 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 260 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=416occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 19 MinimizatonAttempts, 1618 StatesRemovedByMinimization, 16 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...