/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:28:42,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:28:42,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:28:42,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:28:42,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:28:43,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:28:43,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:28:43,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:28:43,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:28:43,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:28:43,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:28:43,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:28:43,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:28:43,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:28:43,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:28:43,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:28:43,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:28:43,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:28:43,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:28:43,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:28:43,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:28:43,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:28:43,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:28:43,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:28:43,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 13:28:43,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 13:28:43,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 13:28:43,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 13:28:43,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 13:28:43,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 13:28:43,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:28:43,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:28:43,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:28:43,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:28:43,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:28:43,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:28:43,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:28:43,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:28:43,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:28:43,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:28:43,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:28:43,076 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:28:43,120 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:28:43,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:28:43,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:28:43,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:28:43,122 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:28:43,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:28:43,123 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:28:43,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:28:43,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:28:43,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:28:43,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:28:43,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:28:43,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:28:43,125 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:28:43,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:28:43,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:28:43,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:28:43,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:28:43,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:28:43,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:28:43,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:28:43,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:28:43,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:28:43,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:28:43,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:28:43,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:28:43,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:28:43,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:28:43,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:28:43,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:28:43,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:28:43,627 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:28:43,633 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:28:43,637 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:28:43,638 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:28:43,639 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-09-04 13:28:43,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7437cf367/022756a7eb17415a8b04e76a6fa09b10/FLAGb673eb286 [2020-09-04 13:28:44,377 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:28:44,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-09-04 13:28:44,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7437cf367/022756a7eb17415a8b04e76a6fa09b10/FLAGb673eb286 [2020-09-04 13:28:44,662 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7437cf367/022756a7eb17415a8b04e76a6fa09b10 [2020-09-04 13:28:44,675 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:28:44,677 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:28:44,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:28:44,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:28:44,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:28:44,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:28:44" (1/1) ... [2020-09-04 13:28:44,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a08ae19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:28:44, skipping insertion in model container [2020-09-04 13:28:44,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:28:44" (1/1) ... [2020-09-04 13:28:44,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:28:44,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:28:45,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:28:45,248 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:28:45,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:28:45,367 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:28:45,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:28:45 WrapperNode [2020-09-04 13:28:45,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:28:45,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:28:45,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:28:45,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:28:45,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:28:45" (1/1) ... [2020-09-04 13:28:45,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:28:45" (1/1) ... [2020-09-04 13:28:45,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:28:45" (1/1) ... [2020-09-04 13:28:45,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:28:45" (1/1) ... [2020-09-04 13:28:45,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:28:45" (1/1) ... [2020-09-04 13:28:45,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:28:45" (1/1) ... [2020-09-04 13:28:45,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:28:45" (1/1) ... [2020-09-04 13:28:45,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:28:45,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:28:45,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:28:45,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:28:45,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:28:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:28:45,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:28:45,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:28:45,531 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-09-04 13:28:45,531 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-09-04 13:28:45,531 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-09-04 13:28:45,531 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-09-04 13:28:45,531 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-09-04 13:28:45,532 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:28:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:28:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-09-04 13:28:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-09-04 13:28:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-09-04 13:28:45,533 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-09-04 13:28:45,533 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-09-04 13:28:45,533 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-09-04 13:28:45,533 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-09-04 13:28:45,534 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-09-04 13:28:45,534 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-09-04 13:28:45,534 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-09-04 13:28:45,535 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-09-04 13:28:45,535 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-09-04 13:28:45,535 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-09-04 13:28:45,535 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-09-04 13:28:45,535 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-09-04 13:28:45,536 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-09-04 13:28:45,536 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-09-04 13:28:45,536 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-09-04 13:28:45,536 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-09-04 13:28:45,536 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-09-04 13:28:45,536 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-09-04 13:28:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-09-04 13:28:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-09-04 13:28:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-09-04 13:28:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-09-04 13:28:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-09-04 13:28:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-09-04 13:28:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-09-04 13:28:45,538 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-09-04 13:28:45,538 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-04 13:28:45,538 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-09-04 13:28:45,538 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-09-04 13:28:45,538 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-09-04 13:28:45,538 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-09-04 13:28:45,539 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-09-04 13:28:45,539 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-09-04 13:28:45,539 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-09-04 13:28:45,539 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-09-04 13:28:45,539 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-09-04 13:28:45,539 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-09-04 13:28:45,539 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-09-04 13:28:45,540 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-09-04 13:28:45,540 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-09-04 13:28:45,540 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-09-04 13:28:45,540 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-09-04 13:28:45,540 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-09-04 13:28:45,541 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-09-04 13:28:45,541 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-09-04 13:28:45,541 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-09-04 13:28:45,541 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-09-04 13:28:45,541 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-09-04 13:28:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-09-04 13:28:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-09-04 13:28:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-09-04 13:28:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-09-04 13:28:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-09-04 13:28:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-09-04 13:28:45,543 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-09-04 13:28:45,543 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-09-04 13:28:45,543 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-09-04 13:28:45,543 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-09-04 13:28:45,543 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-09-04 13:28:45,543 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-09-04 13:28:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-09-04 13:28:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-09-04 13:28:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-09-04 13:28:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-09-04 13:28:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-09-04 13:28:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-09-04 13:28:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-09-04 13:28:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-09-04 13:28:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-09-04 13:28:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-09-04 13:28:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-09-04 13:28:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-09-04 13:28:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-09-04 13:28:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-09-04 13:28:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-09-04 13:28:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-09-04 13:28:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-09-04 13:28:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-09-04 13:28:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-09-04 13:28:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-09-04 13:28:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-09-04 13:28:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-09-04 13:28:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-09-04 13:28:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-09-04 13:28:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-09-04 13:28:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-09-04 13:28:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-09-04 13:28:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-09-04 13:28:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-09-04 13:28:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-09-04 13:28:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-09-04 13:28:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-09-04 13:28:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-09-04 13:28:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-09-04 13:28:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-09-04 13:28:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-09-04 13:28:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-09-04 13:28:45,550 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-09-04 13:28:45,550 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-09-04 13:28:45,550 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 13:28:45,550 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 13:28:45,550 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 13:28:45,550 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 13:28:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-04 13:28:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-09-04 13:28:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 13:28:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-09-04 13:28:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-09-04 13:28:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-09-04 13:28:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-09-04 13:28:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-09-04 13:28:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-09-04 13:28:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-09-04 13:28:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-09-04 13:28:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-09-04 13:28:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-09-04 13:28:45,553 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-09-04 13:28:45,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:28:45,553 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-09-04 13:28:45,553 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-09-04 13:28:45,553 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-09-04 13:28:45,553 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-09-04 13:28:45,554 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:28:45,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:28:45,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 13:28:45,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-04 13:28:45,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:28:45,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 13:28:45,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 13:28:45,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:28:46,147 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:28:46,148 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:28:46,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:28:46 BoogieIcfgContainer [2020-09-04 13:28:46,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:28:46,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:28:46,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:28:46,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:28:46,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:28:44" (1/3) ... [2020-09-04 13:28:46,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af6aaae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:28:46, skipping insertion in model container [2020-09-04 13:28:46,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:28:45" (2/3) ... [2020-09-04 13:28:46,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af6aaae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:28:46, skipping insertion in model container [2020-09-04 13:28:46,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:28:46" (3/3) ... [2020-09-04 13:28:46,162 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-09-04 13:28:46,174 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:28:46,185 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:28:46,207 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:28:46,240 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:28:46,240 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:28:46,240 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:28:46,241 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:28:46,241 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:28:46,241 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:28:46,241 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:28:46,241 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:28:46,266 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-09-04 13:28:46,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:28:46,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:28:46,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:28:46,276 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:28:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:28:46,285 INFO L82 PathProgramCache]: Analyzing trace with hash -573637036, now seen corresponding path program 1 times [2020-09-04 13:28:46,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:28:46,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241350286] [2020-09-04 13:28:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:28:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:46,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:28:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:28:46,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241350286] [2020-09-04 13:28:46,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:28:46,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 13:28:46,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317049957] [2020-09-04 13:28:46,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:28:46,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:28:46,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:28:46,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:28:46,666 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 7 states. [2020-09-04 13:28:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:28:47,086 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-09-04 13:28:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:28:47,088 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-09-04 13:28:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:28:47,104 INFO L225 Difference]: With dead ends: 90 [2020-09-04 13:28:47,104 INFO L226 Difference]: Without dead ends: 44 [2020-09-04 13:28:47,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:28:47,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-04 13:28:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-09-04 13:28:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 13:28:47,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-09-04 13:28:47,199 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2020-09-04 13:28:47,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:28:47,200 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-09-04 13:28:47,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:28:47,200 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-09-04 13:28:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 13:28:47,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:28:47,214 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 13:28:47,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:28:47,215 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:28:47,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:28:47,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1917870949, now seen corresponding path program 1 times [2020-09-04 13:28:47,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:28:47,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825184813] [2020-09-04 13:28:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:28:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:47,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:28:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:47,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:28:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:47,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:28:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:47,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:28:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:47,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:28:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-04 13:28:47,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825184813] [2020-09-04 13:28:47,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:28:47,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 13:28:47,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484963592] [2020-09-04 13:28:47,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:28:47,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:28:47,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:28:47,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:28:47,517 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 9 states. [2020-09-04 13:28:47,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:28:47,768 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-09-04 13:28:47,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:28:47,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-09-04 13:28:47,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:28:47,772 INFO L225 Difference]: With dead ends: 69 [2020-09-04 13:28:47,772 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 13:28:47,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:28:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 13:28:47,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-09-04 13:28:47,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:28:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-09-04 13:28:47,801 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2020-09-04 13:28:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:28:47,803 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-09-04 13:28:47,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:28:47,804 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-09-04 13:28:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 13:28:47,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:28:47,805 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 13:28:47,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:28:47,806 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:28:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:28:47,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1624467942, now seen corresponding path program 1 times [2020-09-04 13:28:47,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:28:47,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139216183] [2020-09-04 13:28:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:28:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:47,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:28:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:47,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:28:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:47,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:28:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:48,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:28:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:48,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:28:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-04 13:28:48,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139216183] [2020-09-04 13:28:48,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868224048] [2020-09-04 13:28:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:28:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-04 13:28:48,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:28:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-04 13:28:48,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:28:48,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 20 [2020-09-04 13:28:48,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404528138] [2020-09-04 13:28:48,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:28:48,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:28:48,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:28:48,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-09-04 13:28:48,737 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 13 states. [2020-09-04 13:28:49,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:28:49,471 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-09-04 13:28:49,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 13:28:49,478 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-09-04 13:28:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:28:49,481 INFO L225 Difference]: With dead ends: 78 [2020-09-04 13:28:49,481 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 13:28:49,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-09-04 13:28:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 13:28:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-09-04 13:28:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-04 13:28:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2020-09-04 13:28:49,499 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 38 [2020-09-04 13:28:49,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:28:49,500 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2020-09-04 13:28:49,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:28:49,500 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2020-09-04 13:28:49,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-04 13:28:49,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:28:49,502 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 13:28:49,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:28:49,718 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:28:49,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:28:49,719 INFO L82 PathProgramCache]: Analyzing trace with hash -789819282, now seen corresponding path program 1 times [2020-09-04 13:28:49,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:28:49,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766384438] [2020-09-04 13:28:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:28:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:49,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:28:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:49,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:28:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:50,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:28:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:50,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:28:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:50,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:28:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:50,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 13:28:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-04 13:28:50,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766384438] [2020-09-04 13:28:50,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18396360] [2020-09-04 13:28:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:28:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:50,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-04 13:28:50,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:28:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-04 13:28:51,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:28:51,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 41 [2020-09-04 13:28:51,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525124481] [2020-09-04 13:28:51,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-04 13:28:51,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:28:51,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-04 13:28:51,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 13:28:51,361 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand 41 states. [2020-09-04 13:28:53,825 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-09-04 13:28:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:28:55,276 INFO L93 Difference]: Finished difference Result 102 states and 140 transitions. [2020-09-04 13:28:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 13:28:55,277 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2020-09-04 13:28:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:28:55,280 INFO L225 Difference]: With dead ends: 102 [2020-09-04 13:28:55,280 INFO L226 Difference]: Without dead ends: 98 [2020-09-04 13:28:55,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=405, Invalid=3501, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 13:28:55,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-04 13:28:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2020-09-04 13:28:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-04 13:28:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2020-09-04 13:28:55,302 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 45 [2020-09-04 13:28:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:28:55,303 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2020-09-04 13:28:55,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-04 13:28:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2020-09-04 13:28:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-04 13:28:55,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:28:55,305 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 13:28:55,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:28:55,520 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:28:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:28:55,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1599165908, now seen corresponding path program 1 times [2020-09-04 13:28:55,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:28:55,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560821672] [2020-09-04 13:28:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:28:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:55,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:28:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:55,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:28:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:55,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:28:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:55,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:28:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:55,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:28:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:55,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 13:28:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-04 13:28:55,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560821672] [2020-09-04 13:28:55,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731883646] [2020-09-04 13:28:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:28:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:55,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-04 13:28:55,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:28:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-04 13:28:56,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:28:56,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 10 [2020-09-04 13:28:56,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525197877] [2020-09-04 13:28:56,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:28:56,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:28:56,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:28:56,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:28:56,035 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand 10 states. [2020-09-04 13:28:56,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:28:56,420 INFO L93 Difference]: Finished difference Result 129 states and 159 transitions. [2020-09-04 13:28:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:28:56,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-09-04 13:28:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:28:56,425 INFO L225 Difference]: With dead ends: 129 [2020-09-04 13:28:56,426 INFO L226 Difference]: Without dead ends: 70 [2020-09-04 13:28:56,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:28:56,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-04 13:28:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2020-09-04 13:28:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-04 13:28:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-09-04 13:28:56,456 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 45 [2020-09-04 13:28:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:28:56,457 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-09-04 13:28:56,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:28:56,457 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-09-04 13:28:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-04 13:28:56,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:28:56,462 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 13:28:56,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:28:56,681 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:28:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:28:56,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1321471087, now seen corresponding path program 1 times [2020-09-04 13:28:56,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:28:56,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771049961] [2020-09-04 13:28:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:28:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:56,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:28:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:56,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:28:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:56,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:28:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:56,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:28:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:56,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:28:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:57,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 13:28:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:28:57,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771049961] [2020-09-04 13:28:57,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551318315] [2020-09-04 13:28:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:28:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:57,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-04 13:28:57,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:28:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:28:57,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:28:57,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 29 [2020-09-04 13:28:57,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464144677] [2020-09-04 13:28:57,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-04 13:28:57,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:28:57,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-04 13:28:57,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2020-09-04 13:28:57,570 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 29 states. [2020-09-04 13:28:59,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:28:59,241 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-09-04 13:28:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 13:28:59,242 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 45 [2020-09-04 13:28:59,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:28:59,243 INFO L225 Difference]: With dead ends: 80 [2020-09-04 13:28:59,243 INFO L226 Difference]: Without dead ends: 76 [2020-09-04 13:28:59,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 13:28:59,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-04 13:28:59,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-09-04 13:28:59,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-04 13:28:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-09-04 13:28:59,257 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 45 [2020-09-04 13:28:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:28:59,258 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-09-04 13:28:59,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-04 13:28:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-09-04 13:28:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-04 13:28:59,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:28:59,259 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 13:28:59,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:28:59,467 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:28:59,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:28:59,468 INFO L82 PathProgramCache]: Analyzing trace with hash 512124461, now seen corresponding path program 1 times [2020-09-04 13:28:59,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:28:59,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199295788] [2020-09-04 13:28:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:28:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:59,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:28:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:59,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:28:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:59,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:28:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:59,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:28:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:59,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:28:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:59,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 13:28:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:28:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:28:59,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199295788] [2020-09-04 13:28:59,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345977135] [2020-09-04 13:28:59,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:00,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-04 13:29:00,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:29:00,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:00,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-09-04 13:29:00,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368288250] [2020-09-04 13:29:00,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 13:29:00,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:00,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 13:29:00,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2020-09-04 13:29:00,504 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 28 states. [2020-09-04 13:29:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:02,229 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-09-04 13:29:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:29:02,230 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 45 [2020-09-04 13:29:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:02,232 INFO L225 Difference]: With dead ends: 90 [2020-09-04 13:29:02,232 INFO L226 Difference]: Without dead ends: 74 [2020-09-04 13:29:02,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=271, Invalid=1369, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 13:29:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-04 13:29:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-04 13:29:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-04 13:29:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-09-04 13:29:02,245 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 45 [2020-09-04 13:29:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:02,246 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-09-04 13:29:02,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 13:29:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-09-04 13:29:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-04 13:29:02,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:02,247 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-04 13:29:02,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-09-04 13:29:02,461 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:02,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:02,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1069126843, now seen corresponding path program 1 times [2020-09-04 13:29:02,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:02,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627849745] [2020-09-04 13:29:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:02,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:02,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:29:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:02,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:29:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:02,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:29:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:02,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:29:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:02,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 13:29:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:02,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-04 13:29:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:02,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-04 13:29:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-04 13:29:03,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627849745] [2020-09-04 13:29:03,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275656585] [2020-09-04 13:29:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-04 13:29:03,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:29:03,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:03,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 31 [2020-09-04 13:29:03,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999596412] [2020-09-04 13:29:03,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-04 13:29:03,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:03,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-04 13:29:03,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-09-04 13:29:03,582 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 31 states. [2020-09-04 13:29:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:05,136 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-09-04 13:29:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 13:29:05,137 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 57 [2020-09-04 13:29:05,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:05,139 INFO L225 Difference]: With dead ends: 74 [2020-09-04 13:29:05,140 INFO L226 Difference]: Without dead ends: 71 [2020-09-04 13:29:05,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 13:29:05,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-04 13:29:05,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-09-04 13:29:05,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-04 13:29:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-09-04 13:29:05,151 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 57 [2020-09-04 13:29:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:05,152 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-09-04 13:29:05,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-04 13:29:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-09-04 13:29:05,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-04 13:29:05,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:05,153 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-04 13:29:05,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:05,367 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:05,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:05,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1878473469, now seen corresponding path program 1 times [2020-09-04 13:29:05,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:05,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056780456] [2020-09-04 13:29:05,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:05,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:05,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:29:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:05,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:29:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:05,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:29:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:05,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:29:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:05,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 13:29:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:05,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-04 13:29:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:05,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-04 13:29:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-04 13:29:05,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056780456] [2020-09-04 13:29:05,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874531666] [2020-09-04 13:29:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:06,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-04 13:29:06,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:29:06,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:06,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 31 [2020-09-04 13:29:06,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831068419] [2020-09-04 13:29:06,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-04 13:29:06,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:06,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-04 13:29:06,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2020-09-04 13:29:06,557 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 31 states. [2020-09-04 13:29:08,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:08,294 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-09-04 13:29:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:29:08,296 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 57 [2020-09-04 13:29:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:08,297 INFO L225 Difference]: With dead ends: 84 [2020-09-04 13:29:08,297 INFO L226 Difference]: Without dead ends: 71 [2020-09-04 13:29:08,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 13:29:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-04 13:29:08,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-09-04 13:29:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-04 13:29:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-09-04 13:29:08,308 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 57 [2020-09-04 13:29:08,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:08,309 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-09-04 13:29:08,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-04 13:29:08,309 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-09-04 13:29:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-04 13:29:08,310 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:08,310 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-04 13:29:08,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:08,514 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:08,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:08,515 INFO L82 PathProgramCache]: Analyzing trace with hash 482320829, now seen corresponding path program 1 times [2020-09-04 13:29:08,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:08,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808382308] [2020-09-04 13:29:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:08,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:08,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:29:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:08,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:29:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:08,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:29:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:08,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:29:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:08,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 13:29:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:08,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-04 13:29:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:08,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-04 13:29:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-04 13:29:08,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808382308] [2020-09-04 13:29:08,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203422198] [2020-09-04 13:29:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:08,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 37 conjunts are in the unsatisfiable core [2020-09-04 13:29:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 13:29:08,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:29:08,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2020-09-04 13:29:08,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547648967] [2020-09-04 13:29:08,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:29:08,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:08,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:29:08,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:29:08,998 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 11 states. [2020-09-04 13:29:09,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:09,658 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-09-04 13:29:09,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 13:29:09,659 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-09-04 13:29:09,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:09,660 INFO L225 Difference]: With dead ends: 81 [2020-09-04 13:29:09,660 INFO L226 Difference]: Without dead ends: 69 [2020-09-04 13:29:09,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:29:09,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-04 13:29:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-09-04 13:29:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 13:29:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-09-04 13:29:09,670 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 57 [2020-09-04 13:29:09,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:09,671 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-09-04 13:29:09,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:29:09,671 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-09-04 13:29:09,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-04 13:29:09,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:09,672 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-04 13:29:09,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-04 13:29:09,885 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:09,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:09,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1291667455, now seen corresponding path program 1 times [2020-09-04 13:29:09,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:09,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052295591] [2020-09-04 13:29:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:10,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:29:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:10,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:29:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:10,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:29:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:10,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:29:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:10,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 13:29:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:10,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 13:29:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:10,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-04 13:29:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:10,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-04 13:29:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-04 13:29:10,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052295591] [2020-09-04 13:29:10,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890710195] [2020-09-04 13:29:10,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:29:10,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-04 13:29:10,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:29:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-04 13:29:10,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:29:10,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [18] total 26 [2020-09-04 13:29:10,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021240632] [2020-09-04 13:29:10,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 13:29:10,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:29:10,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 13:29:10,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2020-09-04 13:29:10,745 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 15 states. [2020-09-04 13:29:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:29:11,394 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-09-04 13:29:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:29:11,395 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-09-04 13:29:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:29:11,396 INFO L225 Difference]: With dead ends: 93 [2020-09-04 13:29:11,397 INFO L226 Difference]: Without dead ends: 82 [2020-09-04 13:29:11,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 13:29:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-04 13:29:11,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2020-09-04 13:29:11,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 13:29:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-09-04 13:29:11,406 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 57 [2020-09-04 13:29:11,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:29:11,407 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-09-04 13:29:11,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 13:29:11,407 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-09-04 13:29:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-04 13:29:11,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:29:11,408 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2020-09-04 13:29:11,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:29:11,610 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:29:11,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:29:11,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1118751113, now seen corresponding path program 1 times [2020-09-04 13:29:11,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:29:11,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138700724] [2020-09-04 13:29:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:29:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:29:11,642 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:29:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:29:11,676 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:29:11,732 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:29:11,732 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:29:11,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 13:29:11,793 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 13 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-09-04 13:29:11,794 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 16 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-09-04 13:29:11,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:29:11 BoogieIcfgContainer [2020-09-04 13:29:11,826 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:29:11,828 INFO L168 Benchmark]: Toolchain (without parser) took 27150.95 ms. Allocated memory was 137.4 MB in the beginning and 437.3 MB in the end (delta: 299.9 MB). Free memory was 97.9 MB in the beginning and 159.1 MB in the end (delta: -61.2 MB). Peak memory consumption was 238.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:29:11,829 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 137.4 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:29:11,830 INFO L168 Benchmark]: CACSL2BoogieTranslator took 690.00 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 97.5 MB in the beginning and 167.2 MB in the end (delta: -69.8 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:29:11,830 INFO L168 Benchmark]: Boogie Preprocessor took 77.43 ms. Allocated memory is still 201.9 MB. Free memory was 167.2 MB in the beginning and 164.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:29:11,831 INFO L168 Benchmark]: RCFGBuilder took 704.66 ms. Allocated memory is still 201.9 MB. Free memory was 163.8 MB in the beginning and 118.2 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:29:11,832 INFO L168 Benchmark]: TraceAbstraction took 25671.48 ms. Allocated memory was 201.9 MB in the beginning and 437.3 MB in the end (delta: 235.4 MB). Free memory was 117.6 MB in the beginning and 159.1 MB in the end (delta: -41.5 MB). Peak memory consumption was 193.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:29:11,836 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 137.4 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 690.00 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 97.5 MB in the beginning and 167.2 MB in the end (delta: -69.8 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 77.43 ms. Allocated memory is still 201.9 MB. Free memory was 167.2 MB in the beginning and 164.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 704.66 ms. Allocated memory is still 201.9 MB. Free memory was 163.8 MB in the beginning and 118.2 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 25671.48 ms. Allocated memory was 201.9 MB in the beginning and 437.3 MB in the end (delta: 235.4 MB). Free memory was 117.6 MB in the beginning and 159.1 MB in the end (delta: -41.5 MB). Peak memory consumption was 193.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 13 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 16 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L867] void * guard_malloc_counter = 0; [L887] struct list_head *elem = ((void *)0); [L900] static struct list_head head; VAL [\old(elem)=14, \old(elem)=9, \old(guard_malloc_counter)=12, \old(guard_malloc_counter)=11, \old(head)=null, \old(head)=null, elem={0:0}, guard_malloc_counter={0:0}, head={3:0}] [L903] struct list_head *dev1, *dev2; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:0}, head={3:0}] [L904] CALL, EXPR my_malloc(sizeof(*dev1)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={3:0}] [L879] CALL, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={3:0}] [L871] (size > 0) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={3:0}, size=8] [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, \result={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={3:0}, size=8] [L879] RET, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, __getMemory(size)={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={3:0}, size=8] [L879] return __getMemory(size); [L904] RET, EXPR my_malloc(sizeof(*dev1)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:1}, head={3:0}, my_malloc(sizeof(*dev1))={0:1}] [L904] dev1 = my_malloc(sizeof(*dev1)) [L905] CALL, EXPR my_malloc(sizeof(*dev2)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={3:0}] [L879] CALL, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=1, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={3:0}] [L871] (size > 0) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={3:0}, size=8] [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=1, \old(size)=8, \result={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={3:0}, size=8] [L879] RET, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, __getMemory(size)={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={3:0}, size=8] [L879] return __getMemory(size); [L905] RET, EXPR my_malloc(sizeof(*dev2)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, elem={0:0}, guard_malloc_counter={0:2}, head={3:0}, my_malloc(sizeof(*dev2))={0:2}] [L905] dev2 = my_malloc(sizeof(*dev2)) [L906] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={3:0}] [L907] CALL list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, new={0:2}] [L890] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, head={3:0}, new={0:2}, new={0:2}] [L891] COND TRUE __VERIFIER_nondet_int() [L892] elem = new VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:2}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, head={3:0}, new={0:2}, new={0:2}] [L907] RET list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:2}, guard_malloc_counter={0:2}, head={3:0}] [L908] CALL list_add(dev1, &head) VAL [\old(elem)=0, \old(elem)=2, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:2}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, new={0:1}] [L890] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=2, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:2}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, head={3:0}, new={0:1}, new={0:1}] [L891] COND TRUE __VERIFIER_nondet_int() [L892] elem = new VAL [\old(elem)=0, \old(elem)=2, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, head={3:0}, new={0:1}, new={0:1}] [L908] RET list_add(dev1, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L909] CALL list_del(dev2) VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, entry={0:2}, guard_malloc_counter={0:2}, head={3:0}] [L896] COND FALSE !(entry==elem) VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, entry={0:2}, entry={0:2}, guard_malloc_counter={0:2}, head={3:0}] [L909] RET list_del(dev2) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L910] CALL list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, new={0:2}] [L890] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, head={3:0}, new={0:2}, new={0:2}] [L891] COND FALSE !(__VERIFIER_nondet_int()) [L910] RET list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L913] CALL list_add(dev1, &head) VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, new={0:1}] [L890] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, head={3:0}, new={0:1}, new={0:1}] [L890] CALL __blast_assert () VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L6] __VERIFIER_error() VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 25.4s, OverallIterations: 12, TraceHistogramMax: 4, AutomataDifference: 13.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 437 SDtfs, 720 SDslu, 1372 SDs, 0 SdLazy, 8188 SolverSat, 1043 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 834 GetRequests, 486 SyntacticMatches, 6 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 67 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 1007 NumberOfCodeBlocks, 1007 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 923 ConstructedInterpolants, 0 QuantifiedInterpolants, 183362 SizeOfPredicates, 57 NumberOfNonLiveVariables, 2559 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 199/305 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...