/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/ldv-regression/rule60_list2.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:34:15,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:34:15,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:34:15,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:34:15,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:34:15,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:34:15,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:34:15,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:34:15,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:34:15,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:34:15,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:34:15,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:34:15,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:34:15,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:34:15,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:34:15,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:34:15,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:34:15,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:34:15,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:34:15,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:34:15,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:34:15,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:34:15,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:34:15,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:34:15,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 20:34:15,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 20:34:15,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 20:34:15,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 20:34:15,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 20:34:15,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 20:34:15,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 20:34:15,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 20:34:15,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 20:34:15,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 20:34:15,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 20:34:15,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 20:34:15,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 20:34:15,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 20:34:15,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:34:15,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:34:15,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:34:15,498 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:34:15,523 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:34:15,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:34:15,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:34:15,530 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:34:15,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:34:15,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:34:15,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:34:15,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:34:15,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:34:15,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:34:15,533 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:34:15,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:34:15,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:34:15,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:34:15,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:34:15,535 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:34:15,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:34:15,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:34:15,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:34:15,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:34:15,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:34:15,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:34:15,537 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:34:15,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:34:16,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:34:16,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:34:16,029 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:34:16,030 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:34:16,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-10-23 20:34:16,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f40d1f635/062b36a1126144cc8dde5cbbacde6693/FLAGfed611c44 [2020-10-23 20:34:16,865 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:34:16,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-10-23 20:34:16,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f40d1f635/062b36a1126144cc8dde5cbbacde6693/FLAGfed611c44 [2020-10-23 20:34:17,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f40d1f635/062b36a1126144cc8dde5cbbacde6693 [2020-10-23 20:34:17,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:34:17,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:34:17,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:34:17,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:34:17,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:34:17,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:34:17" (1/1) ... [2020-10-23 20:34:17,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db2404a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:17, skipping insertion in model container [2020-10-23 20:34:17,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:34:17" (1/1) ... [2020-10-23 20:34:17,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:34:17,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:34:17,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:34:17,611 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:34:17,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:34:17,753 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:34:17,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:17 WrapperNode [2020-10-23 20:34:17,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:34:17,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:34:17,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:34:17,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:34:17,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:17" (1/1) ... [2020-10-23 20:34:17,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:17" (1/1) ... [2020-10-23 20:34:17,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:17" (1/1) ... [2020-10-23 20:34:17,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:17" (1/1) ... [2020-10-23 20:34:17,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:17" (1/1) ... [2020-10-23 20:34:17,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:17" (1/1) ... [2020-10-23 20:34:17,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:17" (1/1) ... [2020-10-23 20:34:17,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:34:17,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:34:17,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:34:17,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:34:17,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:34:17,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:34:17,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:34:17,987 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:34:17,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-10-23 20:34:17,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-10-23 20:34:17,987 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-10-23 20:34:17,987 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-10-23 20:34:17,987 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-10-23 20:34:17,987 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:34:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:34:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:34:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:34:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:34:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-10-23 20:34:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-10-23 20:34:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-10-23 20:34:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-10-23 20:34:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-10-23 20:34:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-10-23 20:34:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-10-23 20:34:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-10-23 20:34:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-10-23 20:34:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-10-23 20:34:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-10-23 20:34:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-10-23 20:34:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-10-23 20:34:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-10-23 20:34:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-10-23 20:34:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-10-23 20:34:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-10-23 20:34:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-10-23 20:34:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-10-23 20:34:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-10-23 20:34:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-10-23 20:34:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-10-23 20:34:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-10-23 20:34:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-10-23 20:34:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-10-23 20:34:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-10-23 20:34:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-10-23 20:34:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-10-23 20:34:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-10-23 20:34:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-10-23 20:34:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-10-23 20:34:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-10-23 20:34:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-10-23 20:34:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-10-23 20:34:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-10-23 20:34:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-10-23 20:34:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-10-23 20:34:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-10-23 20:34:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-10-23 20:34:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-10-23 20:34:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-10-23 20:34:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-10-23 20:34:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-10-23 20:34:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-10-23 20:34:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-10-23 20:34:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-10-23 20:34:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-10-23 20:34:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-10-23 20:34:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-10-23 20:34:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-10-23 20:34:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-10-23 20:34:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-10-23 20:34:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-10-23 20:34:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-10-23 20:34:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-10-23 20:34:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-10-23 20:34:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-10-23 20:34:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-10-23 20:34:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-10-23 20:34:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-10-23 20:34:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-10-23 20:34:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-10-23 20:34:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-10-23 20:34:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-10-23 20:34:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-10-23 20:34:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-10-23 20:34:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-10-23 20:34:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-10-23 20:34:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-10-23 20:34:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-10-23 20:34:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-10-23 20:34:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-10-23 20:34:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-10-23 20:34:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-10-23 20:34:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-10-23 20:34:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-10-23 20:34:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-10-23 20:34:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-10-23 20:34:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-10-23 20:34:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-10-23 20:34:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-10-23 20:34:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-10-23 20:34:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-10-23 20:34:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-10-23 20:34:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-10-23 20:34:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-10-23 20:34:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-10-23 20:34:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-10-23 20:34:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-10-23 20:34:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-10-23 20:34:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-10-23 20:34:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-10-23 20:34:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-10-23 20:34:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-10-23 20:34:18,003 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-10-23 20:34:18,003 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-10-23 20:34:18,003 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-10-23 20:34:18,003 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-10-23 20:34:18,003 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-10-23 20:34:18,003 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-10-23 20:34:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-10-23 20:34:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-10-23 20:34:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 20:34:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 20:34:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 20:34:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 20:34:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 20:34:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-10-23 20:34:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 20:34:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-10-23 20:34:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-10-23 20:34:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-10-23 20:34:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-10-23 20:34:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-10-23 20:34:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-10-23 20:34:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-10-23 20:34:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-10-23 20:34:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-10-23 20:34:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-10-23 20:34:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-10-23 20:34:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:34:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-10-23 20:34:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-10-23 20:34:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-10-23 20:34:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-10-23 20:34:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:34:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:34:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:34:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-23 20:34:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:34:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 20:34:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 20:34:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:34:18,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:34:18,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:34:18,585 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:34:18,585 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:34:18,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:34:18 BoogieIcfgContainer [2020-10-23 20:34:18,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:34:18,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:34:18,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:34:18,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:34:18,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:34:17" (1/3) ... [2020-10-23 20:34:18,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@921c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:34:18, skipping insertion in model container [2020-10-23 20:34:18,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:17" (2/3) ... [2020-10-23 20:34:18,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@921c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:34:18, skipping insertion in model container [2020-10-23 20:34:18,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:34:18" (3/3) ... [2020-10-23 20:34:18,598 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-10-23 20:34:18,612 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:34:18,618 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:34:18,632 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:34:18,659 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:34:18,659 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:34:18,659 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:34:18,659 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:34:18,659 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:34:18,660 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:34:18,660 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:34:18,660 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:34:18,677 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2020-10-23 20:34:18,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 20:34:18,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:18,689 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] [2020-10-23 20:34:18,689 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:18,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1653385351, now seen corresponding path program 1 times [2020-10-23 20:34:18,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:18,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023716946] [2020-10-23 20:34:18,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:18,815 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:34:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:19,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:34:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:34:19,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023716946] [2020-10-23 20:34:19,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:34:19,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:34:19,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854020592] [2020-10-23 20:34:19,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:34:19,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:34:19,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:34:19,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:34:19,206 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 7 states. [2020-10-23 20:34:19,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:34:19,842 INFO L93 Difference]: Finished difference Result 138 states and 168 transitions. [2020-10-23 20:34:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 20:34:19,844 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-23 20:34:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:34:19,857 INFO L225 Difference]: With dead ends: 138 [2020-10-23 20:34:19,858 INFO L226 Difference]: Without dead ends: 73 [2020-10-23 20:34:19,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-23 20:34:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-23 20:34:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-10-23 20:34:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-23 20:34:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-10-23 20:34:19,930 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 27 [2020-10-23 20:34:19,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:34:19,931 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-10-23 20:34:19,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:34:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-10-23 20:34:19,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 20:34:19,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:19,935 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:34:19,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:34:19,936 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:19,937 INFO L82 PathProgramCache]: Analyzing trace with hash 818741348, now seen corresponding path program 1 times [2020-10-23 20:34:19,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:19,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082687566] [2020-10-23 20:34:19,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:19,946 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:34:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:20,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:34:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:20,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:34:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:20,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:20,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 20:34:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:20,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-23 20:34:20,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082687566] [2020-10-23 20:34:20,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:34:20,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:34:20,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124363303] [2020-10-23 20:34:20,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:34:20,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:34:20,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:34:20,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:34:20,342 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 9 states. [2020-10-23 20:34:20,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:34:20,677 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2020-10-23 20:34:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:34:20,678 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-23 20:34:20,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:34:20,681 INFO L225 Difference]: With dead ends: 106 [2020-10-23 20:34:20,681 INFO L226 Difference]: Without dead ends: 79 [2020-10-23 20:34:20,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:34:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-23 20:34:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-10-23 20:34:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-23 20:34:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-10-23 20:34:20,706 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 67 [2020-10-23 20:34:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:34:20,706 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-10-23 20:34:20,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:34:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-10-23 20:34:20,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 20:34:20,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:20,709 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:34:20,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:34:20,710 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:20,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:20,711 INFO L82 PathProgramCache]: Analyzing trace with hash -645962233, now seen corresponding path program 1 times [2020-10-23 20:34:20,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:20,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728258995] [2020-10-23 20:34:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:20,718 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:34:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:20,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:34:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:20,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:34:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:20,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:21,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 20:34:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:21,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 20:34:21,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728258995] [2020-10-23 20:34:21,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:34:21,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:34:21,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826012663] [2020-10-23 20:34:21,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:34:21,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:34:21,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:34:21,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:34:21,034 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 9 states. [2020-10-23 20:34:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:34:21,382 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2020-10-23 20:34:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:34:21,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-23 20:34:21,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:34:21,385 INFO L225 Difference]: With dead ends: 109 [2020-10-23 20:34:21,385 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 20:34:21,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:34:21,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 20:34:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-10-23 20:34:21,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-23 20:34:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-10-23 20:34:21,403 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 67 [2020-10-23 20:34:21,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:34:21,403 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-10-23 20:34:21,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:34:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-10-23 20:34:21,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 20:34:21,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:21,405 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:34:21,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:34:21,405 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:21,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:21,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1821270998, now seen corresponding path program 1 times [2020-10-23 20:34:21,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:21,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638437670] [2020-10-23 20:34:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:21,413 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:34:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:21,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:34:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:21,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:34:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:21,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:21,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 20:34:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:21,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-23 20:34:21,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638437670] [2020-10-23 20:34:21,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:34:21,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 20:34:21,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56596329] [2020-10-23 20:34:21,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 20:34:21,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:34:21,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 20:34:21,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:34:21,859 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 17 states. [2020-10-23 20:34:23,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:34:23,449 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2020-10-23 20:34:23,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 20:34:23,453 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-10-23 20:34:23,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:34:23,455 INFO L225 Difference]: With dead ends: 116 [2020-10-23 20:34:23,456 INFO L226 Difference]: Without dead ends: 112 [2020-10-23 20:34:23,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 20:34:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-23 20:34:23,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-23 20:34:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-23 20:34:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2020-10-23 20:34:23,514 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 67 [2020-10-23 20:34:23,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:34:23,517 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2020-10-23 20:34:23,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 20:34:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2020-10-23 20:34:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-23 20:34:23,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:23,526 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:34:23,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:34:23,529 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:23,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1472109846, now seen corresponding path program 1 times [2020-10-23 20:34:23,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:23,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450388098] [2020-10-23 20:34:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:23,540 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:34:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:23,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:34:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:23,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:34:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:23,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:23,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 20:34:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:23,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:23,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-23 20:34:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:34:23,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450388098] [2020-10-23 20:34:23,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:34:23,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-23 20:34:23,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714590847] [2020-10-23 20:34:23,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 20:34:23,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:34:23,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 20:34:23,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-23 20:34:23,998 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand 18 states. [2020-10-23 20:34:25,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:34:25,485 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2020-10-23 20:34:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 20:34:25,486 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-23 20:34:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:34:25,489 INFO L225 Difference]: With dead ends: 120 [2020-10-23 20:34:25,489 INFO L226 Difference]: Without dead ends: 110 [2020-10-23 20:34:25,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 20:34:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-23 20:34:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-10-23 20:34:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-23 20:34:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2020-10-23 20:34:25,547 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 76 [2020-10-23 20:34:25,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:34:25,554 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2020-10-23 20:34:25,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 20:34:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2020-10-23 20:34:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-23 20:34:25,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:25,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:34:25,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:34:25,557 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:25,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:25,559 INFO L82 PathProgramCache]: Analyzing trace with hash 2079566711, now seen corresponding path program 1 times [2020-10-23 20:34:25,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:25,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707274932] [2020-10-23 20:34:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:25,569 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:34:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:25,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:34:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:25,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:34:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:25,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:25,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 20:34:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:25,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:26,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-23 20:34:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:34:26,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707274932] [2020-10-23 20:34:26,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:34:26,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-10-23 20:34:26,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57210134] [2020-10-23 20:34:26,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 20:34:26,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:34:26,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 20:34:26,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2020-10-23 20:34:26,163 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand 23 states. [2020-10-23 20:34:27,609 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-23 20:34:28,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:34:28,287 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2020-10-23 20:34:28,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-23 20:34:28,288 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2020-10-23 20:34:28,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:34:28,291 INFO L225 Difference]: With dead ends: 119 [2020-10-23 20:34:28,291 INFO L226 Difference]: Without dead ends: 111 [2020-10-23 20:34:28,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 20:34:28,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-23 20:34:28,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-23 20:34:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-23 20:34:28,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2020-10-23 20:34:28,321 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 77 [2020-10-23 20:34:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:34:28,321 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2020-10-23 20:34:28,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 20:34:28,321 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2020-10-23 20:34:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-23 20:34:28,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:28,323 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:34:28,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:34:28,323 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:28,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1754951300, now seen corresponding path program 1 times [2020-10-23 20:34:28,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:28,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103942904] [2020-10-23 20:34:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:28,332 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:34:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:28,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:34:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:28,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:34:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:28,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:28,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 20:34:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:28,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:28,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-23 20:34:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:28,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-23 20:34:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:28,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-23 20:34:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-23 20:34:29,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103942904] [2020-10-23 20:34:29,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:34:29,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-10-23 20:34:29,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553403208] [2020-10-23 20:34:29,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 20:34:29,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:34:29,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 20:34:29,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-10-23 20:34:29,074 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand 24 states. [2020-10-23 20:34:31,034 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-23 20:34:31,392 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-23 20:34:31,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:34:31,753 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2020-10-23 20:34:31,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-23 20:34:31,755 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2020-10-23 20:34:31,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:34:31,757 INFO L225 Difference]: With dead ends: 142 [2020-10-23 20:34:31,757 INFO L226 Difference]: Without dead ends: 125 [2020-10-23 20:34:31,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2020-10-23 20:34:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-23 20:34:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-23 20:34:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-23 20:34:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2020-10-23 20:34:31,792 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 91 [2020-10-23 20:34:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:34:31,793 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2020-10-23 20:34:31,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 20:34:31,793 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2020-10-23 20:34:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-23 20:34:31,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:31,794 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:34:31,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 20:34:31,795 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:31,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:31,795 INFO L82 PathProgramCache]: Analyzing trace with hash -188247350, now seen corresponding path program 2 times [2020-10-23 20:34:31,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:31,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920777822] [2020-10-23 20:34:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:31,803 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:34:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:31,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:34:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:31,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:34:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:32,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:32,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 20:34:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:32,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:32,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-23 20:34:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:32,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-23 20:34:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:32,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-23 20:34:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:34:32,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920777822] [2020-10-23 20:34:32,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:34:32,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-10-23 20:34:32,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684750407] [2020-10-23 20:34:32,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 20:34:32,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:34:32,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 20:34:32,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-10-23 20:34:32,389 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand 24 states. [2020-10-23 20:34:34,388 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-23 20:34:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:34:34,556 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2020-10-23 20:34:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-23 20:34:34,557 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2020-10-23 20:34:34,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:34:34,559 INFO L225 Difference]: With dead ends: 141 [2020-10-23 20:34:34,559 INFO L226 Difference]: Without dead ends: 135 [2020-10-23 20:34:34,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=232, Invalid=1748, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 20:34:34,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-23 20:34:34,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-23 20:34:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-23 20:34:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2020-10-23 20:34:34,617 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 91 [2020-10-23 20:34:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:34:34,619 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2020-10-23 20:34:34,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 20:34:34,619 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2020-10-23 20:34:34,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-23 20:34:34,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:34,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:34:34,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 20:34:34,622 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:34,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:34,623 INFO L82 PathProgramCache]: Analyzing trace with hash -462605947, now seen corresponding path program 1 times [2020-10-23 20:34:34,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:34,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108809789] [2020-10-23 20:34:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:34,635 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:34:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:34,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:34:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:34,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:34:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:34,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:34,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 20:34:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:35,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 20:34:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:35,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-23 20:34:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:35,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-23 20:34:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:35,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-23 20:34:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:34:35,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108809789] [2020-10-23 20:34:35,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:34:35,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-10-23 20:34:35,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840603206] [2020-10-23 20:34:35,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 20:34:35,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:34:35,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 20:34:35,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-10-23 20:34:35,114 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand 19 states. [2020-10-23 20:34:36,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:34:36,824 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2020-10-23 20:34:36,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-23 20:34:36,824 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 92 [2020-10-23 20:34:36,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:34:36,826 INFO L225 Difference]: With dead ends: 163 [2020-10-23 20:34:36,826 INFO L226 Difference]: Without dead ends: 149 [2020-10-23 20:34:36,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 20:34:36,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-23 20:34:36,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 133. [2020-10-23 20:34:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-23 20:34:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2020-10-23 20:34:36,858 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 92 [2020-10-23 20:34:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:34:36,859 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2020-10-23 20:34:36,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 20:34:36,859 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2020-10-23 20:34:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-23 20:34:36,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:36,861 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:34:36,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 20:34:36,861 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:36,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:36,862 INFO L82 PathProgramCache]: Analyzing trace with hash -472690422, now seen corresponding path program 1 times [2020-10-23 20:34:36,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:36,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887463048] [2020-10-23 20:34:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:36,868 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:266) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:147) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-23 20:34:36,874 INFO L168 Benchmark]: Toolchain (without parser) took 19731.01 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 126.8 MB in the beginning and 166.9 MB in the end (delta: -40.1 MB). Peak memory consumption was 124.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:34:36,874 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:34:36,875 INFO L168 Benchmark]: CACSL2BoogieTranslator took 603.62 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 102.1 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:34:36,876 INFO L168 Benchmark]: Boogie Preprocessor took 100.45 ms. Allocated memory is still 151.0 MB. Free memory was 102.1 MB in the beginning and 99.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:34:36,877 INFO L168 Benchmark]: RCFGBuilder took 722.44 ms. Allocated memory is still 151.0 MB. Free memory was 99.4 MB in the beginning and 90.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:34:36,878 INFO L168 Benchmark]: TraceAbstraction took 18282.32 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 90.0 MB in the beginning and 166.9 MB in the end (delta: -76.9 MB). Peak memory consumption was 87.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:34:36,882 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 603.62 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 102.1 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 100.45 ms. Allocated memory is still 151.0 MB. Free memory was 102.1 MB in the beginning and 99.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 722.44 ms. Allocated memory is still 151.0 MB. Free memory was 99.4 MB in the beginning and 90.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18282.32 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 90.0 MB in the beginning and 166.9 MB in the end (delta: -76.9 MB). Peak memory consumption was 87.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...