/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 0.2.0-7d8eed3 [2020-11-07 00:56:01,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:56:01,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:56:01,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:56:01,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:56:01,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:56:01,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:56:01,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:56:01,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:56:01,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:56:01,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:56:01,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:56:01,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:56:01,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:56:01,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:56:01,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:56:01,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:56:01,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:56:01,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:56:01,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:56:01,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:56:01,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:56:01,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:56:01,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:56:01,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 00:56:01,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 00:56:01,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 00:56:01,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 00:56:01,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 00:56:01,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 00:56:01,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 00:56:01,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 00:56:01,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 00:56:01,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 00:56:01,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 00:56:01,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 00:56:01,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 00:56:01,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 00:56:01,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:56:01,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:56:01,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:56:01,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:56:01,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:56:01,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:56:01,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:56:01,667 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:56:01,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:56:01,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:56:01,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:56:01,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:56:01,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:56:01,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:56:01,669 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:56:01,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:56:01,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:56:01,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:56:01,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:56:01,670 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:56:01,670 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:56:01,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:56:01,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:56:01,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:56:01,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:56:01,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:56:01,672 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:56:02,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:56:02,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:56:02,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:56:02,090 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:56:02,095 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:56:02,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-11-07 00:56:02,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3455c12ae/4294f2620e8644728e2d35dc02cea2e7/FLAG3b556128c [2020-11-07 00:56:02,938 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:56:02,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-11-07 00:56:02,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3455c12ae/4294f2620e8644728e2d35dc02cea2e7/FLAG3b556128c [2020-11-07 00:56:03,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3455c12ae/4294f2620e8644728e2d35dc02cea2e7 [2020-11-07 00:56:03,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:56:03,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:56:03,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:56:03,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:56:03,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:56:03,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:03" (1/1) ... [2020-11-07 00:56:03,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3d3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:03, skipping insertion in model container [2020-11-07 00:56:03,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:03" (1/1) ... [2020-11-07 00:56:03,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:56:03,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:56:03,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:56:03,654 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:56:03,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:56:03,798 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:56:03,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:03 WrapperNode [2020-11-07 00:56:03,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:56:03,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:56:03,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:56:03,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:56:03,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:03" (1/1) ... [2020-11-07 00:56:03,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:03" (1/1) ... [2020-11-07 00:56:03,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:03" (1/1) ... [2020-11-07 00:56:03,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:03" (1/1) ... [2020-11-07 00:56:03,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:03" (1/1) ... [2020-11-07 00:56:03,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:03" (1/1) ... [2020-11-07 00:56:03,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:03" (1/1) ... [2020-11-07 00:56:03,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:56:03,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:56:03,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:56:03,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:56:03,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:56:04,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:56:04,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:56:04,066 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:56:04,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:56:04,066 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-07 00:56:04,066 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-07 00:56:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-07 00:56:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-07 00:56:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-07 00:56:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-07 00:56:04,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-07 00:56:04,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-07 00:56:04,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-07 00:56:04,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-07 00:56:04,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-07 00:56:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-07 00:56:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-07 00:56:04,070 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-07 00:56:04,070 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-07 00:56:04,070 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-07 00:56:04,072 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-07 00:56:04,072 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-07 00:56:04,074 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-07 00:56:04,075 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-07 00:56:04,075 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-07 00:56:04,075 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-07 00:56:04,075 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-07 00:56:04,075 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-07 00:56:04,076 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-07 00:56:04,076 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-07 00:56:04,076 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-07 00:56:04,077 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-07 00:56:04,077 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-07 00:56:04,077 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-07 00:56:04,077 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-07 00:56:04,077 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-07 00:56:04,078 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-07 00:56:04,078 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-07 00:56:04,078 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-07 00:56:04,078 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-07 00:56:04,078 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-07 00:56:04,079 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-07 00:56:04,079 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-07 00:56:04,079 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-07 00:56:04,079 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-07 00:56:04,079 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-07 00:56:04,079 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-07 00:56:04,080 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-07 00:56:04,080 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-07 00:56:04,080 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-07 00:56:04,080 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-07 00:56:04,080 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-07 00:56:04,080 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-07 00:56:04,080 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-07 00:56:04,081 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 00:56:04,081 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-07 00:56:04,081 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-07 00:56:04,081 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-07 00:56:04,081 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-07 00:56:04,081 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-07 00:56:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-07 00:56:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-07 00:56:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-07 00:56:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:56:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-07 00:56:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-07 00:56:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-07 00:56:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 00:56:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-07 00:56:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-07 00:56:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-07 00:56:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-07 00:56:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-07 00:56:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-07 00:56:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-07 00:56:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-07 00:56:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-07 00:56:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-07 00:56:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-07 00:56:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-07 00:56:04,087 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-07 00:56:04,087 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-07 00:56:04,087 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-07 00:56:04,087 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-07 00:56:04,087 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-07 00:56:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-07 00:56:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-07 00:56:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-07 00:56:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-07 00:56:04,090 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-07 00:56:04,090 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-07 00:56:04,090 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-07 00:56:04,091 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-07 00:56:04,091 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-07 00:56:04,091 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-07 00:56:04,092 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-07 00:56:04,092 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-07 00:56:04,092 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-07 00:56:04,092 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-07 00:56:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-07 00:56:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-07 00:56:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-07 00:56:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-07 00:56:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-07 00:56:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-07 00:56:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-07 00:56:04,094 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-07 00:56:04,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:56:04,094 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:56:04,094 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 00:56:04,094 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 00:56:04,094 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:56:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:56:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:56:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 00:56:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 00:56:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 00:56:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:56:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:56:04,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:56:04,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:56:04,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:56:04,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:56:04,849 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:56:04,850 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-11-07 00:56:04,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:04 BoogieIcfgContainer [2020-11-07 00:56:04,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:56:04,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:56:04,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:56:04,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:56:04,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:56:03" (1/3) ... [2020-11-07 00:56:04,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61496822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:04, skipping insertion in model container [2020-11-07 00:56:04,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:03" (2/3) ... [2020-11-07 00:56:04,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61496822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:04, skipping insertion in model container [2020-11-07 00:56:04,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:04" (3/3) ... [2020-11-07 00:56:04,862 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2020-11-07 00:56:04,900 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:56:04,904 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:56:04,917 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:56:04,943 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:56:04,943 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:56:04,943 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:56:04,944 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:56:04,944 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:56:04,944 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:56:04,944 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:56:04,944 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:56:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-11-07 00:56:04,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-07 00:56:04,975 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:04,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:04,976 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:04,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1609758844, now seen corresponding path program 1 times [2020-11-07 00:56:04,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:04,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906431374] [2020-11-07 00:56:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:05,085 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:05,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:05,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906431374] [2020-11-07 00:56:05,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:05,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 00:56:05,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631827640] [2020-11-07 00:56:05,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 00:56:05,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:05,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 00:56:05,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:56:05,323 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 5 states. [2020-11-07 00:56:05,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:05,838 INFO L93 Difference]: Finished difference Result 358 states and 505 transitions. [2020-11-07 00:56:05,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 00:56:05,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-07 00:56:05,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:05,854 INFO L225 Difference]: With dead ends: 358 [2020-11-07 00:56:05,854 INFO L226 Difference]: Without dead ends: 186 [2020-11-07 00:56:05,861 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 [2020-11-07 00:56:05,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-07 00:56:05,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-11-07 00:56:05,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-07 00:56:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2020-11-07 00:56:05,978 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 18 [2020-11-07 00:56:05,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:05,978 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2020-11-07 00:56:05,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 00:56:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2020-11-07 00:56:05,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-07 00:56:05,980 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:05,980 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] [2020-11-07 00:56:05,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:56:05,981 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:05,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1384880224, now seen corresponding path program 1 times [2020-11-07 00:56:05,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:05,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633511186] [2020-11-07 00:56:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:05,990 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:06,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:06,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633511186] [2020-11-07 00:56:06,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:06,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:56:06,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585639249] [2020-11-07 00:56:06,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:56:06,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:06,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:56:06,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:06,095 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand 4 states. [2020-11-07 00:56:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:06,447 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2020-11-07 00:56:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:56:06,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-07 00:56:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:06,450 INFO L225 Difference]: With dead ends: 167 [2020-11-07 00:56:06,450 INFO L226 Difference]: Without dead ends: 160 [2020-11-07 00:56:06,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:06,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-07 00:56:06,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-11-07 00:56:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-07 00:56:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 181 transitions. [2020-11-07 00:56:06,476 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 181 transitions. Word has length 30 [2020-11-07 00:56:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:06,476 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 181 transitions. [2020-11-07 00:56:06,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:56:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 181 transitions. [2020-11-07 00:56:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 00:56:06,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:06,478 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] [2020-11-07 00:56:06,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:56:06,478 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:06,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:06,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1492035453, now seen corresponding path program 1 times [2020-11-07 00:56:06,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:06,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150171146] [2020-11-07 00:56:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:06,485 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:06,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:06,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150171146] [2020-11-07 00:56:06,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:06,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:56:06,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236404138] [2020-11-07 00:56:06,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:56:06,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:06,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:56:06,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:56:06,703 INFO L87 Difference]: Start difference. First operand 160 states and 181 transitions. Second operand 8 states. [2020-11-07 00:56:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:07,402 INFO L93 Difference]: Finished difference Result 249 states and 284 transitions. [2020-11-07 00:56:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 00:56:07,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-11-07 00:56:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:07,406 INFO L225 Difference]: With dead ends: 249 [2020-11-07 00:56:07,407 INFO L226 Difference]: Without dead ends: 242 [2020-11-07 00:56:07,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:56:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-11-07 00:56:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 155. [2020-11-07 00:56:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-11-07 00:56:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2020-11-07 00:56:07,454 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 32 [2020-11-07 00:56:07,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:07,454 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2020-11-07 00:56:07,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:56:07,455 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2020-11-07 00:56:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-07 00:56:07,457 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:07,457 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] [2020-11-07 00:56:07,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:56:07,462 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:07,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:07,464 INFO L82 PathProgramCache]: Analyzing trace with hash -66764841, now seen corresponding path program 1 times [2020-11-07 00:56:07,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:07,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042929858] [2020-11-07 00:56:07,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:07,480 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:07,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:07,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042929858] [2020-11-07 00:56:07,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:07,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:56:07,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022740099] [2020-11-07 00:56:07,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:56:07,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:07,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:56:07,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:56:07,619 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand 6 states. [2020-11-07 00:56:08,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:08,168 INFO L93 Difference]: Finished difference Result 362 states and 415 transitions. [2020-11-07 00:56:08,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:56:08,168 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-11-07 00:56:08,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:08,170 INFO L225 Difference]: With dead ends: 362 [2020-11-07 00:56:08,171 INFO L226 Difference]: Without dead ends: 241 [2020-11-07 00:56:08,172 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 [2020-11-07 00:56:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-11-07 00:56:08,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 158. [2020-11-07 00:56:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 00:56:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 178 transitions. [2020-11-07 00:56:08,193 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 178 transitions. Word has length 38 [2020-11-07 00:56:08,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:08,193 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 178 transitions. [2020-11-07 00:56:08,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:56:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 178 transitions. [2020-11-07 00:56:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-07 00:56:08,195 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:08,195 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] [2020-11-07 00:56:08,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:56:08,196 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:08,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:08,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1112940044, now seen corresponding path program 1 times [2020-11-07 00:56:08,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:08,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707056668] [2020-11-07 00:56:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:08,201 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:08,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:08,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707056668] [2020-11-07 00:56:08,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:08,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:56:08,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403704714] [2020-11-07 00:56:08,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:56:08,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:56:08,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:56:08,289 INFO L87 Difference]: Start difference. First operand 158 states and 178 transitions. Second operand 6 states. [2020-11-07 00:56:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:08,826 INFO L93 Difference]: Finished difference Result 260 states and 296 transitions. [2020-11-07 00:56:08,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 00:56:08,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-11-07 00:56:08,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:08,829 INFO L225 Difference]: With dead ends: 260 [2020-11-07 00:56:08,829 INFO L226 Difference]: Without dead ends: 229 [2020-11-07 00:56:08,831 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 [2020-11-07 00:56:08,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-11-07 00:56:08,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 158. [2020-11-07 00:56:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 00:56:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2020-11-07 00:56:08,865 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 40 [2020-11-07 00:56:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:08,868 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2020-11-07 00:56:08,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:56:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2020-11-07 00:56:08,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-07 00:56:08,877 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:08,877 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] [2020-11-07 00:56:08,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:56:08,878 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:08,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:08,880 INFO L82 PathProgramCache]: Analyzing trace with hash 232926315, now seen corresponding path program 1 times [2020-11-07 00:56:08,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:08,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632045496] [2020-11-07 00:56:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:08,894 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:09,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:09,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632045496] [2020-11-07 00:56:09,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:09,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:56:09,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447252316] [2020-11-07 00:56:09,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:56:09,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:09,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:56:09,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:56:09,051 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand 7 states. [2020-11-07 00:56:09,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:09,945 INFO L93 Difference]: Finished difference Result 238 states and 269 transitions. [2020-11-07 00:56:09,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 00:56:09,947 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-11-07 00:56:09,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:09,949 INFO L225 Difference]: With dead ends: 238 [2020-11-07 00:56:09,949 INFO L226 Difference]: Without dead ends: 233 [2020-11-07 00:56:09,950 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 [2020-11-07 00:56:09,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-07 00:56:09,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 156. [2020-11-07 00:56:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-11-07 00:56:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 173 transitions. [2020-11-07 00:56:09,983 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 173 transitions. Word has length 44 [2020-11-07 00:56:09,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:09,992 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 173 transitions. [2020-11-07 00:56:09,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:56:09,993 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 173 transitions. [2020-11-07 00:56:09,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 00:56:09,994 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:09,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:09,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:56:09,995 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:09,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:09,996 INFO L82 PathProgramCache]: Analyzing trace with hash 439633619, now seen corresponding path program 1 times [2020-11-07 00:56:09,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:09,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543050754] [2020-11-07 00:56:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:10,003 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:10,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:10,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543050754] [2020-11-07 00:56:10,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:10,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:56:10,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941573396] [2020-11-07 00:56:10,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:56:10,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:10,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:56:10,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:10,071 INFO L87 Difference]: Start difference. First operand 156 states and 173 transitions. Second operand 4 states. [2020-11-07 00:56:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:10,508 INFO L93 Difference]: Finished difference Result 259 states and 295 transitions. [2020-11-07 00:56:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:56:10,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-11-07 00:56:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:10,510 INFO L225 Difference]: With dead ends: 259 [2020-11-07 00:56:10,511 INFO L226 Difference]: Without dead ends: 192 [2020-11-07 00:56:10,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-11-07 00:56:10,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 159. [2020-11-07 00:56:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-07 00:56:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2020-11-07 00:56:10,534 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 48 [2020-11-07 00:56:10,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:10,535 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2020-11-07 00:56:10,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:56:10,535 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2020-11-07 00:56:10,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-07 00:56:10,536 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:10,536 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] [2020-11-07 00:56:10,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:56:10,537 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:10,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:10,537 INFO L82 PathProgramCache]: Analyzing trace with hash 824217848, now seen corresponding path program 1 times [2020-11-07 00:56:10,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:10,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121700737] [2020-11-07 00:56:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:10,542 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:10,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:10,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121700737] [2020-11-07 00:56:10,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:10,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:56:10,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392444601] [2020-11-07 00:56:10,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:56:10,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:10,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:56:10,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:10,609 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand 4 states. [2020-11-07 00:56:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:10,923 INFO L93 Difference]: Finished difference Result 162 states and 179 transitions. [2020-11-07 00:56:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:56:10,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-11-07 00:56:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:10,925 INFO L225 Difference]: With dead ends: 162 [2020-11-07 00:56:10,925 INFO L226 Difference]: Without dead ends: 158 [2020-11-07 00:56:10,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-07 00:56:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-11-07 00:56:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 00:56:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 175 transitions. [2020-11-07 00:56:10,948 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 175 transitions. Word has length 50 [2020-11-07 00:56:10,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:10,948 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 175 transitions. [2020-11-07 00:56:10,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:56:10,948 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 175 transitions. [2020-11-07 00:56:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 00:56:10,949 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:10,949 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] [2020-11-07 00:56:10,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 00:56:10,950 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:10,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:10,950 INFO L82 PathProgramCache]: Analyzing trace with hash -817730258, now seen corresponding path program 1 times [2020-11-07 00:56:10,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:10,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150750428] [2020-11-07 00:56:10,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:10,955 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:11,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:11,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150750428] [2020-11-07 00:56:11,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:11,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:56:11,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884935440] [2020-11-07 00:56:11,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:56:11,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:11,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:56:11,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:56:11,114 INFO L87 Difference]: Start difference. First operand 158 states and 175 transitions. Second operand 9 states. [2020-11-07 00:56:12,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:12,114 INFO L93 Difference]: Finished difference Result 345 states and 390 transitions. [2020-11-07 00:56:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 00:56:12,115 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-11-07 00:56:12,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:12,117 INFO L225 Difference]: With dead ends: 345 [2020-11-07 00:56:12,117 INFO L226 Difference]: Without dead ends: 276 [2020-11-07 00:56:12,118 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 [2020-11-07 00:56:12,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-11-07 00:56:12,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 177. [2020-11-07 00:56:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-11-07 00:56:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 195 transitions. [2020-11-07 00:56:12,144 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 195 transitions. Word has length 54 [2020-11-07 00:56:12,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:12,145 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 195 transitions. [2020-11-07 00:56:12,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:56:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 195 transitions. [2020-11-07 00:56:12,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-07 00:56:12,146 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:12,146 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] [2020-11-07 00:56:12,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 00:56:12,146 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:12,147 INFO L82 PathProgramCache]: Analyzing trace with hash -419961564, now seen corresponding path program 1 times [2020-11-07 00:56:12,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:12,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287963578] [2020-11-07 00:56:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:12,151 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:12,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:12,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287963578] [2020-11-07 00:56:12,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:12,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:56:12,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122320622] [2020-11-07 00:56:12,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:56:12,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:12,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:56:12,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:12,218 INFO L87 Difference]: Start difference. First operand 177 states and 195 transitions. Second operand 4 states. [2020-11-07 00:56:12,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:12,535 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2020-11-07 00:56:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:56:12,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-11-07 00:56:12,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:12,538 INFO L225 Difference]: With dead ends: 185 [2020-11-07 00:56:12,538 INFO L226 Difference]: Without dead ends: 178 [2020-11-07 00:56:12,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-07 00:56:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-11-07 00:56:12,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-11-07 00:56:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2020-11-07 00:56:12,569 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 58 [2020-11-07 00:56:12,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:12,569 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2020-11-07 00:56:12,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:56:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2020-11-07 00:56:12,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 00:56:12,571 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:12,571 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] [2020-11-07 00:56:12,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 00:56:12,571 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:12,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:12,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1529988056, now seen corresponding path program 1 times [2020-11-07 00:56:12,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:12,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840603206] [2020-11-07 00:56:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:12,727 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:12,731 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:12,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:12,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840603206] [2020-11-07 00:56:12,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:12,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:56:12,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617368019] [2020-11-07 00:56:12,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:56:12,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:12,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:56:12,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:56:12,929 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand 8 states. [2020-11-07 00:56:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:13,586 INFO L93 Difference]: Finished difference Result 263 states and 293 transitions. [2020-11-07 00:56:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:56:13,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-11-07 00:56:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:13,589 INFO L225 Difference]: With dead ends: 263 [2020-11-07 00:56:13,589 INFO L226 Difference]: Without dead ends: 233 [2020-11-07 00:56:13,590 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 [2020-11-07 00:56:13,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-07 00:56:13,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2020-11-07 00:56:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-11-07 00:56:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2020-11-07 00:56:13,633 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 59 [2020-11-07 00:56:13,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:13,634 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2020-11-07 00:56:13,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:56:13,634 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2020-11-07 00:56:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 00:56:13,635 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:13,635 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] [2020-11-07 00:56:13,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 00:56:13,635 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:13,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:13,636 INFO L82 PathProgramCache]: Analyzing trace with hash 184861191, now seen corresponding path program 1 times [2020-11-07 00:56:13,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:13,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118277257] [2020-11-07 00:56:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:13,640 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:14,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:14,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118277257] [2020-11-07 00:56:14,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:14,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 00:56:14,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162657237] [2020-11-07 00:56:14,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 00:56:14,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:14,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 00:56:14,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:56:14,226 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand 14 states. [2020-11-07 00:56:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:16,983 INFO L93 Difference]: Finished difference Result 637 states and 723 transitions. [2020-11-07 00:56:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 00:56:16,984 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-11-07 00:56:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:16,992 INFO L225 Difference]: With dead ends: 637 [2020-11-07 00:56:16,992 INFO L226 Difference]: Without dead ends: 632 [2020-11-07 00:56:16,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 00:56:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2020-11-07 00:56:17,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 236. [2020-11-07 00:56:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-11-07 00:56:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 264 transitions. [2020-11-07 00:56:17,056 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 264 transitions. Word has length 59 [2020-11-07 00:56:17,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:17,056 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 264 transitions. [2020-11-07 00:56:17,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 00:56:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 264 transitions. [2020-11-07 00:56:17,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-07 00:56:17,057 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:17,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:17,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 00:56:17,058 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:17,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:17,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1994540127, now seen corresponding path program 1 times [2020-11-07 00:56:17,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:17,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086945409] [2020-11-07 00:56:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:17,063 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:17,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:17,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086945409] [2020-11-07 00:56:17,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:17,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:56:17,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745685160] [2020-11-07 00:56:17,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:56:17,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:17,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:56:17,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:56:17,185 INFO L87 Difference]: Start difference. First operand 236 states and 264 transitions. Second operand 8 states. [2020-11-07 00:56:17,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:17,911 INFO L93 Difference]: Finished difference Result 259 states and 288 transitions. [2020-11-07 00:56:17,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 00:56:17,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-11-07 00:56:17,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:17,914 INFO L225 Difference]: With dead ends: 259 [2020-11-07 00:56:17,914 INFO L226 Difference]: Without dead ends: 252 [2020-11-07 00:56:17,915 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 [2020-11-07 00:56:17,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-11-07 00:56:17,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 231. [2020-11-07 00:56:17,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-11-07 00:56:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 258 transitions. [2020-11-07 00:56:17,978 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 258 transitions. Word has length 60 [2020-11-07 00:56:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:17,978 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 258 transitions. [2020-11-07 00:56:17,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:56:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 258 transitions. [2020-11-07 00:56:17,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-07 00:56:17,980 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:17,980 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] [2020-11-07 00:56:17,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 00:56:17,980 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:17,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:17,981 INFO L82 PathProgramCache]: Analyzing trace with hash -215686495, now seen corresponding path program 1 times [2020-11-07 00:56:17,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:17,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431912161] [2020-11-07 00:56:17,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:17,984 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:18,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:18,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431912161] [2020-11-07 00:56:18,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:18,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:56:18,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384549496] [2020-11-07 00:56:18,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:56:18,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:18,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:56:18,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:56:18,596 INFO L87 Difference]: Start difference. First operand 231 states and 258 transitions. Second operand 15 states. [2020-11-07 00:56:19,137 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-11-07 00:56:19,381 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-11-07 00:56:20,190 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-07 00:56:21,052 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-11-07 00:56:22,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:22,307 INFO L93 Difference]: Finished difference Result 625 states and 708 transitions. [2020-11-07 00:56:22,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 00:56:22,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-11-07 00:56:22,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:22,316 INFO L225 Difference]: With dead ends: 625 [2020-11-07 00:56:22,317 INFO L226 Difference]: Without dead ends: 620 [2020-11-07 00:56:22,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 00:56:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-11-07 00:56:22,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 235. [2020-11-07 00:56:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-11-07 00:56:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 262 transitions. [2020-11-07 00:56:22,378 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 262 transitions. Word has length 63 [2020-11-07 00:56:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:22,378 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 262 transitions. [2020-11-07 00:56:22,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:56:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 262 transitions. [2020-11-07 00:56:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 00:56:22,379 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:22,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:22,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 00:56:22,380 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:22,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:22,380 INFO L82 PathProgramCache]: Analyzing trace with hash -233861473, now seen corresponding path program 1 times [2020-11-07 00:56:22,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:22,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273902658] [2020-11-07 00:56:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:22,500 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-11-07 00:56:22,547 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:22,550 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:22,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:22,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273902658] [2020-11-07 00:56:22,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:22,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:56:22,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135453428] [2020-11-07 00:56:22,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:56:22,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:56:22,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:22,623 INFO L87 Difference]: Start difference. First operand 235 states and 262 transitions. Second operand 4 states. [2020-11-07 00:56:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:23,039 INFO L93 Difference]: Finished difference Result 243 states and 269 transitions. [2020-11-07 00:56:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:56:23,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-11-07 00:56:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:23,041 INFO L225 Difference]: With dead ends: 243 [2020-11-07 00:56:23,041 INFO L226 Difference]: Without dead ends: 239 [2020-11-07 00:56:23,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-11-07 00:56:23,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 234. [2020-11-07 00:56:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-07 00:56:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 260 transitions. [2020-11-07 00:56:23,093 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 260 transitions. Word has length 64 [2020-11-07 00:56:23,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:23,093 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 260 transitions. [2020-11-07 00:56:23,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:56:23,093 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 260 transitions. [2020-11-07 00:56:23,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-07 00:56:23,094 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:23,094 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] [2020-11-07 00:56:23,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 00:56:23,095 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:23,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:23,095 INFO L82 PathProgramCache]: Analyzing trace with hash 906480798, now seen corresponding path program 1 times [2020-11-07 00:56:23,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:23,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121564287] [2020-11-07 00:56:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:23,227 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:23,229 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:23,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:23,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121564287] [2020-11-07 00:56:23,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:23,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:56:23,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524897484] [2020-11-07 00:56:23,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:56:23,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:23,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:56:23,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:56:23,349 INFO L87 Difference]: Start difference. First operand 234 states and 260 transitions. Second operand 7 states. [2020-11-07 00:56:24,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:24,292 INFO L93 Difference]: Finished difference Result 378 states and 425 transitions. [2020-11-07 00:56:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 00:56:24,292 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-11-07 00:56:24,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:24,294 INFO L225 Difference]: With dead ends: 378 [2020-11-07 00:56:24,295 INFO L226 Difference]: Without dead ends: 271 [2020-11-07 00:56:24,296 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 [2020-11-07 00:56:24,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-11-07 00:56:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 234. [2020-11-07 00:56:24,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-07 00:56:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 258 transitions. [2020-11-07 00:56:24,365 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 258 transitions. Word has length 65 [2020-11-07 00:56:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:24,365 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 258 transitions. [2020-11-07 00:56:24,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:56:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 258 transitions. [2020-11-07 00:56:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-07 00:56:24,366 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:24,366 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] [2020-11-07 00:56:24,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 00:56:24,367 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:24,367 INFO L82 PathProgramCache]: Analyzing trace with hash 894248917, now seen corresponding path program 1 times [2020-11-07 00:56:24,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:24,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116813125] [2020-11-07 00:56:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:24,483 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-11-07 00:56:24,530 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:24,533 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:24,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:24,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116813125] [2020-11-07 00:56:24,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:24,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:56:24,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71692283] [2020-11-07 00:56:24,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:56:24,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:24,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:56:24,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:56:24,681 INFO L87 Difference]: Start difference. First operand 234 states and 258 transitions. Second operand 9 states. [2020-11-07 00:56:25,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:25,849 INFO L93 Difference]: Finished difference Result 490 states and 547 transitions. [2020-11-07 00:56:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 00:56:25,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-11-07 00:56:25,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:25,853 INFO L225 Difference]: With dead ends: 490 [2020-11-07 00:56:25,853 INFO L226 Difference]: Without dead ends: 422 [2020-11-07 00:56:25,854 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 [2020-11-07 00:56:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-11-07 00:56:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 320. [2020-11-07 00:56:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-11-07 00:56:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 357 transitions. [2020-11-07 00:56:25,939 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 357 transitions. Word has length 68 [2020-11-07 00:56:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:25,939 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 357 transitions. [2020-11-07 00:56:25,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:56:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 357 transitions. [2020-11-07 00:56:25,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-07 00:56:25,941 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:25,941 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] [2020-11-07 00:56:25,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 00:56:25,941 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:25,942 INFO L82 PathProgramCache]: Analyzing trace with hash -680181352, now seen corresponding path program 1 times [2020-11-07 00:56:25,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:25,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756152837] [2020-11-07 00:56:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:25,955 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:25,958 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:26,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:26,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756152837] [2020-11-07 00:56:26,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:26,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:56:26,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424071613] [2020-11-07 00:56:26,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:56:26,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:26,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:56:26,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:26,020 INFO L87 Difference]: Start difference. First operand 320 states and 357 transitions. Second operand 4 states. [2020-11-07 00:56:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:26,520 INFO L93 Difference]: Finished difference Result 560 states and 644 transitions. [2020-11-07 00:56:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:56:26,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-11-07 00:56:26,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:26,524 INFO L225 Difference]: With dead ends: 560 [2020-11-07 00:56:26,524 INFO L226 Difference]: Without dead ends: 426 [2020-11-07 00:56:26,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:56:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-11-07 00:56:26,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 369. [2020-11-07 00:56:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-11-07 00:56:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 415 transitions. [2020-11-07 00:56:26,644 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 415 transitions. Word has length 70 [2020-11-07 00:56:26,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:26,644 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 415 transitions. [2020-11-07 00:56:26,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:56:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 415 transitions. [2020-11-07 00:56:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-07 00:56:26,647 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:26,647 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] [2020-11-07 00:56:26,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 00:56:26,647 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:26,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:26,648 INFO L82 PathProgramCache]: Analyzing trace with hash -266651992, now seen corresponding path program 1 times [2020-11-07 00:56:26,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:26,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401037843] [2020-11-07 00:56:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:26,748 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:26,751 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:27,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:27,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401037843] [2020-11-07 00:56:27,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:27,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 00:56:27,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242503044] [2020-11-07 00:56:27,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 00:56:27,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:27,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 00:56:27,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:56:27,034 INFO L87 Difference]: Start difference. First operand 369 states and 415 transitions. Second operand 10 states. [2020-11-07 00:56:28,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:28,602 INFO L93 Difference]: Finished difference Result 600 states and 682 transitions. [2020-11-07 00:56:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 00:56:28,603 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-11-07 00:56:28,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:28,606 INFO L225 Difference]: With dead ends: 600 [2020-11-07 00:56:28,606 INFO L226 Difference]: Without dead ends: 539 [2020-11-07 00:56:28,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:56:28,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-11-07 00:56:28,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 416. [2020-11-07 00:56:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-11-07 00:56:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 470 transitions. [2020-11-07 00:56:28,727 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 470 transitions. Word has length 73 [2020-11-07 00:56:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:28,727 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 470 transitions. [2020-11-07 00:56:28,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 00:56:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 470 transitions. [2020-11-07 00:56:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-07 00:56:28,728 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:28,729 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] [2020-11-07 00:56:28,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 00:56:28,729 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:28,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2064139585, now seen corresponding path program 1 times [2020-11-07 00:56:28,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:28,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475718332] [2020-11-07 00:56:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:28,845 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:28,847 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:56:28,868 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:56:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:56:28,887 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:56:28,938 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:56:28,938 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:56:28,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 00:56:28,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:56:28 BoogieIcfgContainer [2020-11-07 00:56:28,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:56:28,979 INFO L168 Benchmark]: Toolchain (without parser) took 25733.35 ms. Allocated memory was 154.1 MB in the beginning and 332.4 MB in the end (delta: 178.3 MB). Free memory was 129.3 MB in the beginning and 293.4 MB in the end (delta: -164.1 MB). Peak memory consumption was 15.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:56:28,979 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 154.1 MB. Free memory was 128.6 MB in the beginning and 128.5 MB in the end (delta: 77.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:56:28,985 INFO L168 Benchmark]: CACSL2BoogieTranslator took 549.04 ms. Allocated memory is still 154.1 MB. Free memory was 128.6 MB in the beginning and 106.1 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:56:28,988 INFO L168 Benchmark]: Boogie Preprocessor took 173.32 ms. Allocated memory is still 154.1 MB. Free memory was 106.1 MB in the beginning and 135.5 MB in the end (delta: -29.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:56:28,988 INFO L168 Benchmark]: RCFGBuilder took 878.26 ms. Allocated memory is still 154.1 MB. Free memory was 135.5 MB in the beginning and 74.2 MB in the end (delta: 61.3 MB). Peak memory consumption was 60.8 MB. Max. memory is 8.0 GB. [2020-11-07 00:56:28,989 INFO L168 Benchmark]: TraceAbstraction took 24117.27 ms. Allocated memory was 154.1 MB in the beginning and 332.4 MB in the end (delta: 178.3 MB). Free memory was 73.7 MB in the beginning and 293.4 MB in the end (delta: -219.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:56:28,994 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 154.1 MB. Free memory was 128.6 MB in the beginning and 128.5 MB in the end (delta: 77.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 549.04 ms. Allocated memory is still 154.1 MB. Free memory was 128.6 MB in the beginning and 106.1 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 173.32 ms. Allocated memory is still 154.1 MB. Free memory was 106.1 MB in the beginning and 135.5 MB in the end (delta: -29.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 878.26 ms. Allocated memory is still 154.1 MB. Free memory was 135.5 MB in the beginning and 74.2 MB in the end (delta: 61.3 MB). Peak memory consumption was 60.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 24117.27 ms. Allocated memory was 154.1 MB in the beginning and 332.4 MB in the end (delta: 178.3 MB). Free memory was 73.7 MB in the beginning and 293.4 MB in the end (delta: -219.8 MB). There was no memory consumed. 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: 23.9s, OverallIterations: 20, TraceHistogramMax: 2, AutomataDifference: 18.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3287 SDtfs, 4596 SDslu, 10317 SDs, 0 SdLazy, 7155 SolverSat, 423 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 259 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 6.1s 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, 1619 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...