/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 0.1.25-72570d3 [2020-08-22 16:42:32,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:42:32,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:42:32,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:42:32,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:42:32,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:42:32,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:42:32,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:42:32,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:42:32,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:42:32,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:42:32,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:42:32,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:42:32,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:42:32,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:42:32,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:42:32,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:42:32,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:42:32,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:42:32,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:42:32,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:42:32,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:42:32,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:42:32,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:42:32,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 16:42:32,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 16:42:32,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 16:42:32,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 16:42:32,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 16:42:32,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 16:42:32,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 16:42:32,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 16:42:32,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 16:42:32,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 16:42:32,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 16:42:32,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 16:42:32,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 16:42:32,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 16:42:32,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:42:32,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:42:32,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:42:32,533 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:42:32,555 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:42:32,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:42:32,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:42:32,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:42:32,558 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:42:32,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:42:32,558 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:42:32,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:42:32,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:42:32,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:42:32,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:42:32,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:42:32,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:42:32,559 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:42:32,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:42:32,560 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:42:32,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:42:32,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:42:32,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:42:32,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:42:32,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:42:32,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:42:32,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:42:32,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:42:32,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:42:32,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:42:32,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:42:32,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:42:32,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:42:32,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:42:32,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:42:32,879 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:42:32,882 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:42:32,884 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:42:32,884 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:42:32,885 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-22 16:42:32,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d21351b44/c0118d9adfd1488daa469dd5e8ca3672/FLAGf1df76284 [2020-08-22 16:42:33,443 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:42:33,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-22 16:42:33,458 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d21351b44/c0118d9adfd1488daa469dd5e8ca3672/FLAGf1df76284 [2020-08-22 16:42:33,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d21351b44/c0118d9adfd1488daa469dd5e8ca3672 [2020-08-22 16:42:33,810 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:42:33,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:42:33,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:42:33,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:42:33,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:42:33,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:42:33" (1/1) ... [2020-08-22 16:42:33,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40f5f1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:42:33, skipping insertion in model container [2020-08-22 16:42:33,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:42:33" (1/1) ... [2020-08-22 16:42:33,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:42:33,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:42:34,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:42:34,443 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:42:34,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:42:34,557 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:42:34,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:42:34 WrapperNode [2020-08-22 16:42:34,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:42:34,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:42:34,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:42:34,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:42:34,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:42:34" (1/1) ... [2020-08-22 16:42:34,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:42:34" (1/1) ... [2020-08-22 16:42:34,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:42:34" (1/1) ... [2020-08-22 16:42:34,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:42:34" (1/1) ... [2020-08-22 16:42:34,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:42:34" (1/1) ... [2020-08-22 16:42:34,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:42:34" (1/1) ... [2020-08-22 16:42:34,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:42:34" (1/1) ... [2020-08-22 16:42:34,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:42:34,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:42:34,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:42:34,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:42:34,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:42:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:42:34,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:42:34,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:42:34,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-22 16:42:34,706 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-08-22 16:42:34,706 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-08-22 16:42:34,706 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-08-22 16:42:34,706 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-08-22 16:42:34,706 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:42:34,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:42:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-22 16:42:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-08-22 16:42:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-08-22 16:42:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-08-22 16:42:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-08-22 16:42:34,708 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-08-22 16:42:34,708 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-08-22 16:42:34,708 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-08-22 16:42:34,708 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-08-22 16:42:34,708 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-08-22 16:42:34,708 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-08-22 16:42:34,709 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-08-22 16:42:34,709 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-08-22 16:42:34,709 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-08-22 16:42:34,709 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-08-22 16:42:34,709 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-08-22 16:42:34,709 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-08-22 16:42:34,710 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-08-22 16:42:34,710 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-08-22 16:42:34,710 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-08-22 16:42:34,710 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-08-22 16:42:34,710 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-08-22 16:42:34,710 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-08-22 16:42:34,710 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-08-22 16:42:34,711 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-08-22 16:42:34,711 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-08-22 16:42:34,711 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-08-22 16:42:34,711 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-08-22 16:42:34,711 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-08-22 16:42:34,711 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-22 16:42:34,711 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-08-22 16:42:34,712 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-08-22 16:42:34,712 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-08-22 16:42:34,712 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-08-22 16:42:34,712 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-08-22 16:42:34,712 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-08-22 16:42:34,712 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-08-22 16:42:34,713 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-08-22 16:42:34,713 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-08-22 16:42:34,713 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-22 16:42:34,713 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-08-22 16:42:34,713 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-08-22 16:42:34,713 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-08-22 16:42:34,714 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-08-22 16:42:34,714 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-08-22 16:42:34,714 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-08-22 16:42:34,714 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-08-22 16:42:34,714 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-08-22 16:42:34,714 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-08-22 16:42:34,714 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-08-22 16:42:34,715 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-08-22 16:42:34,715 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-08-22 16:42:34,715 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-08-22 16:42:34,715 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-08-22 16:42:34,715 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-08-22 16:42:34,715 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-22 16:42:34,715 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-08-22 16:42:34,716 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-08-22 16:42:34,716 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-08-22 16:42:34,716 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-08-22 16:42:34,716 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-08-22 16:42:34,716 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-08-22 16:42:34,716 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-08-22 16:42:34,717 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-08-22 16:42:34,717 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-08-22 16:42:34,717 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-08-22 16:42:34,717 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-08-22 16:42:34,717 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-08-22 16:42:34,717 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-08-22 16:42:34,718 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-08-22 16:42:34,718 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-08-22 16:42:34,718 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-08-22 16:42:34,718 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-08-22 16:42:34,718 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-08-22 16:42:34,718 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-08-22 16:42:34,719 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-08-22 16:42:34,719 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-08-22 16:42:34,719 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-08-22 16:42:34,719 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-08-22 16:42:34,719 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-08-22 16:42:34,719 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-08-22 16:42:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-08-22 16:42:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-08-22 16:42:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-08-22 16:42:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-08-22 16:42:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-08-22 16:42:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-08-22 16:42:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-08-22 16:42:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-08-22 16:42:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-08-22 16:42:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-08-22 16:42:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-08-22 16:42:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-08-22 16:42:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-08-22 16:42:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-08-22 16:42:34,722 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-08-22 16:42:34,722 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-08-22 16:42:34,722 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-08-22 16:42:34,722 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-08-22 16:42:34,722 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-08-22 16:42:34,722 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-08-22 16:42:34,723 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-08-22 16:42:34,723 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 16:42:34,723 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 16:42:34,723 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 16:42:34,723 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 16:42:34,723 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 16:42:34,723 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-08-22 16:42:34,724 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 16:42:34,724 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-08-22 16:42:34,724 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-08-22 16:42:34,724 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-08-22 16:42:34,724 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-08-22 16:42:34,724 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-08-22 16:42:34,725 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-08-22 16:42:34,725 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-08-22 16:42:34,725 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-08-22 16:42:34,725 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-08-22 16:42:34,725 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-08-22 16:42:34,725 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-08-22 16:42:34,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:42:34,726 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-08-22 16:42:34,726 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-08-22 16:42:34,726 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-08-22 16:42:34,726 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-08-22 16:42:34,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:42:34,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:42:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:42:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-22 16:42:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:42:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 16:42:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 16:42:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:42:35,335 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:42:35,336 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:42:35,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:42:35 BoogieIcfgContainer [2020-08-22 16:42:35,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:42:35,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:42:35,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:42:35,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:42:35,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:42:33" (1/3) ... [2020-08-22 16:42:35,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a095846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:42:35, skipping insertion in model container [2020-08-22 16:42:35,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:42:34" (2/3) ... [2020-08-22 16:42:35,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a095846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:42:35, skipping insertion in model container [2020-08-22 16:42:35,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:42:35" (3/3) ... [2020-08-22 16:42:35,350 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-08-22 16:42:35,362 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:42:35,373 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:42:35,391 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:42:35,425 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:42:35,426 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:42:35,426 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:42:35,426 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:42:35,427 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:42:35,427 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:42:35,427 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:42:35,427 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:42:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-08-22 16:42:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:42:35,468 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:42:35,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:42:35,470 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:42:35,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:42:35,479 INFO L82 PathProgramCache]: Analyzing trace with hash -573637036, now seen corresponding path program 1 times [2020-08-22 16:42:35,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:42:35,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902038318] [2020-08-22 16:42:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:42:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:35,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:42:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:42:35,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902038318] [2020-08-22 16:42:35,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:42:35,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 16:42:35,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624659595] [2020-08-22 16:42:35,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:42:35,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:42:35,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:42:35,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:42:35,937 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 7 states. [2020-08-22 16:42:36,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:42:36,535 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-08-22 16:42:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:42:36,537 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-22 16:42:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:42:36,551 INFO L225 Difference]: With dead ends: 90 [2020-08-22 16:42:36,551 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 16:42:36,556 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 [2020-08-22 16:42:36,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 16:42:36,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-22 16:42:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 16:42:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-08-22 16:42:36,618 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2020-08-22 16:42:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:42:36,619 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-08-22 16:42:36,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:42:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-08-22 16:42:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 16:42:36,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:42:36,622 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] [2020-08-22 16:42:36,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:42:36,623 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:42:36,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:42:36,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1917870949, now seen corresponding path program 1 times [2020-08-22 16:42:36,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:42:36,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880653158] [2020-08-22 16:42:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:42:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:36,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:42:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:36,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:42:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:36,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:36,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:42:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:36,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:42:36,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880653158] [2020-08-22 16:42:36,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:42:36,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 16:42:36,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296080837] [2020-08-22 16:42:36,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:42:36,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:42:36,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:42:36,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:42:36,943 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 9 states. [2020-08-22 16:42:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:42:37,196 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-08-22 16:42:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:42:37,197 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-22 16:42:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:42:37,199 INFO L225 Difference]: With dead ends: 69 [2020-08-22 16:42:37,199 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 16:42:37,201 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 [2020-08-22 16:42:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 16:42:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-22 16:42:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 16:42:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-08-22 16:42:37,216 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2020-08-22 16:42:37,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:42:37,216 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-08-22 16:42:37,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:42:37,217 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-08-22 16:42:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 16:42:37,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:42:37,218 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] [2020-08-22 16:42:37,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:42:37,219 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:42:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:42:37,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1624467942, now seen corresponding path program 1 times [2020-08-22 16:42:37,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:42:37,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000419877] [2020-08-22 16:42:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:42:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:37,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:42:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:37,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:42:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:37,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:37,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:42:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:37,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:42:37,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000419877] [2020-08-22 16:42:37,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901801227] [2020-08-22 16:42:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:42:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:37,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 26 conjunts are in the unsatisfiable core [2020-08-22 16:42:37,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:42:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:42:38,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:42:38,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 20 [2020-08-22 16:42:38,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909805728] [2020-08-22 16:42:38,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:42:38,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:42:38,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:42:38,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:42:38,101 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 13 states. [2020-08-22 16:42:38,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:42:38,746 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-08-22 16:42:38,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 16:42:38,747 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-08-22 16:42:38,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:42:38,750 INFO L225 Difference]: With dead ends: 78 [2020-08-22 16:42:38,750 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 16:42:38,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:42:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 16:42:38,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-08-22 16:42:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 16:42:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2020-08-22 16:42:38,768 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 38 [2020-08-22 16:42:38,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:42:38,768 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2020-08-22 16:42:38,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:42:38,769 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2020-08-22 16:42:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 16:42:38,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:42:38,774 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] [2020-08-22 16:42:38,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-08-22 16:42:38,989 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:42:38,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:42:38,990 INFO L82 PathProgramCache]: Analyzing trace with hash -789819282, now seen corresponding path program 1 times [2020-08-22 16:42:38,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:42:38,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809013331] [2020-08-22 16:42:38,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:42:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:39,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:42:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:39,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:42:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:39,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:39,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:42:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:39,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:39,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:42:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:42:39,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809013331] [2020-08-22 16:42:39,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676883506] [2020-08-22 16:42:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:42:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:39,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2020-08-22 16:42:39,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:42:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:42:40,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:42:40,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 41 [2020-08-22 16:42:40,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86083834] [2020-08-22 16:42:40,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 16:42:40,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:42:40,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 16:42:40,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 16:42:40,331 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand 41 states. [2020-08-22 16:42:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:42:43,425 INFO L93 Difference]: Finished difference Result 102 states and 140 transitions. [2020-08-22 16:42:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 16:42:43,426 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2020-08-22 16:42:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:42:43,429 INFO L225 Difference]: With dead ends: 102 [2020-08-22 16:42:43,429 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 16:42:43,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=405, Invalid=3501, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 16:42:43,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 16:42:43,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2020-08-22 16:42:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 16:42:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2020-08-22 16:42:43,453 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 45 [2020-08-22 16:42:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:42:43,454 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2020-08-22 16:42:43,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 16:42:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2020-08-22 16:42:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 16:42:43,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:42:43,456 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] [2020-08-22 16:42:43,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:42:43,670 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:42:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:42:43,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1599165908, now seen corresponding path program 1 times [2020-08-22 16:42:43,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:42:43,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463221992] [2020-08-22 16:42:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:42:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:43,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:42:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:43,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:42:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:43,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:43,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:42:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:43,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:43,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:42:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:42:43,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463221992] [2020-08-22 16:42:43,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863880099] [2020-08-22 16:42:43,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:42:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:44,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjunts are in the unsatisfiable core [2020-08-22 16:42:44,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:42:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-22 16:42:44,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:42:44,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 10 [2020-08-22 16:42:44,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033486680] [2020-08-22 16:42:44,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:42:44,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:42:44,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:42:44,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:42:44,059 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand 10 states. [2020-08-22 16:42:44,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:42:44,397 INFO L93 Difference]: Finished difference Result 129 states and 159 transitions. [2020-08-22 16:42:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:42:44,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-08-22 16:42:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:42:44,405 INFO L225 Difference]: With dead ends: 129 [2020-08-22 16:42:44,405 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 16:42:44,406 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 [2020-08-22 16:42:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 16:42:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2020-08-22 16:42:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 16:42:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-08-22 16:42:44,441 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 45 [2020-08-22 16:42:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:42:44,441 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-08-22 16:42:44,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:42:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-08-22 16:42:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 16:42:44,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:42:44,444 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] [2020-08-22 16:42:44,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:42:44,662 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:42:44,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:42:44,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1321471087, now seen corresponding path program 1 times [2020-08-22 16:42:44,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:42:44,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913660592] [2020-08-22 16:42:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:42:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:44,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:42:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:44,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:42:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:44,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:44,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:42:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:44,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:45,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:42:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:42:45,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913660592] [2020-08-22 16:42:45,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331540343] [2020-08-22 16:42:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:42:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:45,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 23 conjunts are in the unsatisfiable core [2020-08-22 16:42:45,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:42:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:42:45,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:42:45,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 29 [2020-08-22 16:42:45,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906303525] [2020-08-22 16:42:45,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 16:42:45,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:42:45,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 16:42:45,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2020-08-22 16:42:45,549 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 29 states. [2020-08-22 16:42:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:42:46,952 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-08-22 16:42:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:42:46,953 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 45 [2020-08-22 16:42:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:42:46,955 INFO L225 Difference]: With dead ends: 80 [2020-08-22 16:42:46,955 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 16:42:46,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 16:42:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 16:42:46,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-08-22 16:42:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 16:42:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-08-22 16:42:46,969 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 45 [2020-08-22 16:42:46,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:42:46,969 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-08-22 16:42:46,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 16:42:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-08-22 16:42:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 16:42:46,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:42:46,971 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] [2020-08-22 16:42:47,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:42:47,181 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:42:47,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:42:47,181 INFO L82 PathProgramCache]: Analyzing trace with hash 512124461, now seen corresponding path program 1 times [2020-08-22 16:42:47,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:42:47,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943019801] [2020-08-22 16:42:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:42:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:47,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:42:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:47,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:42:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:47,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:47,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:42:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:47,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:47,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:42:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:42:47,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943019801] [2020-08-22 16:42:47,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371661935] [2020-08-22 16:42:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:42:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:47,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 23 conjunts are in the unsatisfiable core [2020-08-22 16:42:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:42:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:42:47,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:42:47,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-08-22 16:42:47,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549050067] [2020-08-22 16:42:47,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 16:42:47,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:42:47,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 16:42:47,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:42:47,923 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 28 states. [2020-08-22 16:42:49,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:42:49,316 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-08-22 16:42:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 16:42:49,317 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 45 [2020-08-22 16:42:49,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:42:49,319 INFO L225 Difference]: With dead ends: 90 [2020-08-22 16:42:49,320 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 16:42:49,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=271, Invalid=1369, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 16:42:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 16:42:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-08-22 16:42:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 16:42:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-08-22 16:42:49,332 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 45 [2020-08-22 16:42:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:42:49,333 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-08-22 16:42:49,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 16:42:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-08-22 16:42:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 16:42:49,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:42:49,335 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] [2020-08-22 16:42:49,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-08-22 16:42:49,548 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:42:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:42:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1069126843, now seen corresponding path program 1 times [2020-08-22 16:42:49,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:42:49,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766300140] [2020-08-22 16:42:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:42:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:49,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:42:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:49,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:42:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:49,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:49,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:42:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:49,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:49,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:42:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:49,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 16:42:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:49,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 16:42:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 16:42:49,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766300140] [2020-08-22 16:42:49,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581640487] [2020-08-22 16:42:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:42:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:50,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 25 conjunts are in the unsatisfiable core [2020-08-22 16:42:50,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:42:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:42:50,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:42:50,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 31 [2020-08-22 16:42:50,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636808427] [2020-08-22 16:42:50,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 16:42:50,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:42:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 16:42:50,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-08-22 16:42:50,395 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 31 states. [2020-08-22 16:42:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:42:51,584 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-08-22 16:42:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:42:51,585 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 57 [2020-08-22 16:42:51,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:42:51,587 INFO L225 Difference]: With dead ends: 74 [2020-08-22 16:42:51,587 INFO L226 Difference]: Without dead ends: 71 [2020-08-22 16:42:51,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 16:42:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-22 16:42:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-22 16:42:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 16:42:51,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-08-22 16:42:51,598 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 57 [2020-08-22 16:42:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:42:51,599 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-08-22 16:42:51,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 16:42:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-08-22 16:42:51,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 16:42:51,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:42:51,600 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] [2020-08-22 16:42:51,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:42:51,807 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:42:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:42:51,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1878473469, now seen corresponding path program 1 times [2020-08-22 16:42:51,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:42:51,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458829532] [2020-08-22 16:42:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:42:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:51,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:42:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:51,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:42:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:51,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:51,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:42:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:52,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:52,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:42:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:52,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 16:42:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:52,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 16:42:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 16:42:52,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458829532] [2020-08-22 16:42:52,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786894086] [2020-08-22 16:42:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:42:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:52,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 23 conjunts are in the unsatisfiable core [2020-08-22 16:42:52,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:42:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:42:52,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:42:52,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 31 [2020-08-22 16:42:52,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464071705] [2020-08-22 16:42:52,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 16:42:52,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:42:52,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 16:42:52,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2020-08-22 16:42:52,635 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 31 states. [2020-08-22 16:42:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:42:53,973 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-22 16:42:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 16:42:53,974 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 57 [2020-08-22 16:42:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:42:53,975 INFO L225 Difference]: With dead ends: 84 [2020-08-22 16:42:53,976 INFO L226 Difference]: Without dead ends: 71 [2020-08-22 16:42:53,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 16:42:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-22 16:42:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-22 16:42:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 16:42:53,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-08-22 16:42:53,986 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 57 [2020-08-22 16:42:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:42:53,987 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-08-22 16:42:53,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 16:42:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-08-22 16:42:53,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 16:42:53,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:42:53,989 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] [2020-08-22 16:42:54,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:42:54,195 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:42:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:42:54,195 INFO L82 PathProgramCache]: Analyzing trace with hash 482320829, now seen corresponding path program 1 times [2020-08-22 16:42:54,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:42:54,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553931312] [2020-08-22 16:42:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:42:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:54,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:42:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:54,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:42:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:54,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:54,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:42:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:54,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:54,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:42:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:54,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 16:42:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:54,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 16:42:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-22 16:42:54,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553931312] [2020-08-22 16:42:54,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452629250] [2020-08-22 16:42:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:42:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:54,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 37 conjunts are in the unsatisfiable core [2020-08-22 16:42:54,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:42:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 16:42:54,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:42:54,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2020-08-22 16:42:54,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788986890] [2020-08-22 16:42:54,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:42:54,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:42:54,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:42:54,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:42:54,588 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 11 states. [2020-08-22 16:42:55,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:42:55,060 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-08-22 16:42:55,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:42:55,061 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-22 16:42:55,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:42:55,062 INFO L225 Difference]: With dead ends: 81 [2020-08-22 16:42:55,062 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 16:42:55,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:42:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 16:42:55,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-22 16:42:55,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 16:42:55,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-08-22 16:42:55,072 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 57 [2020-08-22 16:42:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:42:55,073 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-08-22 16:42:55,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:42:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-08-22 16:42:55,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 16:42:55,074 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:42:55,075 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] [2020-08-22 16:42:55,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-08-22 16:42:55,289 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:42:55,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:42:55,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1291667455, now seen corresponding path program 1 times [2020-08-22 16:42:55,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:42:55,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854058300] [2020-08-22 16:42:55,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:42:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:55,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:42:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:55,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:42:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:55,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:55,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:42:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:55,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:42:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:55,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:42:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:55,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 16:42:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:55,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 16:42:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-22 16:42:55,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854058300] [2020-08-22 16:42:55,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365783816] [2020-08-22 16:42:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:42:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:42:55,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 24 conjunts are in the unsatisfiable core [2020-08-22 16:42:55,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:42:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-22 16:42:56,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:42:56,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [18] total 26 [2020-08-22 16:42:56,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248927729] [2020-08-22 16:42:56,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 16:42:56,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:42:56,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 16:42:56,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:42:56,037 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 15 states. [2020-08-22 16:42:56,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:42:56,598 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-08-22 16:42:56,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:42:56,599 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-08-22 16:42:56,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:42:56,600 INFO L225 Difference]: With dead ends: 93 [2020-08-22 16:42:56,600 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 16:42:56,601 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 [2020-08-22 16:42:56,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 16:42:56,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2020-08-22 16:42:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 16:42:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-08-22 16:42:56,611 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 57 [2020-08-22 16:42:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:42:56,612 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-08-22 16:42:56,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 16:42:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-08-22 16:42:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 16:42:56,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:42:56,613 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] [2020-08-22 16:42:56,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:42:56,829 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:42:56,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:42:56,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1118751113, now seen corresponding path program 1 times [2020-08-22 16:42:56,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:42:56,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619933902] [2020-08-22 16:42:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:42:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:42:56,852 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:42:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:42:56,873 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:42:56,906 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:42:56,907 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:42:56,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 16:42:56,956 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 16 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-08-22 16:42:56,957 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 13 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-08-22 16:42:56,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:42:56 BoogieIcfgContainer [2020-08-22 16:42:56,994 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:42:56,997 INFO L168 Benchmark]: Toolchain (without parser) took 23184.46 ms. Allocated memory was 147.8 MB in the beginning and 359.7 MB in the end (delta: 211.8 MB). Free memory was 103.4 MB in the beginning and 210.7 MB in the end (delta: -107.3 MB). Peak memory consumption was 104.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:42:56,997 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:42:56,998 INFO L168 Benchmark]: CACSL2BoogieTranslator took 745.87 ms. Allocated memory was 147.8 MB in the beginning and 208.7 MB in the end (delta: 60.8 MB). Free memory was 103.2 MB in the beginning and 173.3 MB in the end (delta: -70.1 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:42:56,999 INFO L168 Benchmark]: Boogie Preprocessor took 66.52 ms. Allocated memory is still 208.7 MB. Free memory was 172.6 MB in the beginning and 170.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-22 16:42:56,999 INFO L168 Benchmark]: RCFGBuilder took 714.88 ms. Allocated memory is still 208.7 MB. Free memory was 170.0 MB in the beginning and 123.8 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:42:57,000 INFO L168 Benchmark]: TraceAbstraction took 21651.76 ms. Allocated memory was 208.7 MB in the beginning and 359.7 MB in the end (delta: 151.0 MB). Free memory was 123.8 MB in the beginning and 210.7 MB in the end (delta: -86.9 MB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:42:57,003 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 745.87 ms. Allocated memory was 147.8 MB in the beginning and 208.7 MB in the end (delta: 60.8 MB). Free memory was 103.2 MB in the beginning and 173.3 MB in the end (delta: -70.1 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.52 ms. Allocated memory is still 208.7 MB. Free memory was 172.6 MB in the beginning and 170.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 714.88 ms. Allocated memory is still 208.7 MB. Free memory was 170.0 MB in the beginning and 123.8 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21651.76 ms. Allocated memory was 208.7 MB in the beginning and 359.7 MB in the end (delta: 151.0 MB). Free memory was 123.8 MB in the beginning and 210.7 MB in the end (delta: -86.9 MB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 16 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 13 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)=9, \old(elem)=14, \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)=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}, 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)=0, \old(elem)=1, \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)=0, \old(elem)=1, \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: 21.4s, OverallIterations: 12, TraceHistogramMax: 4, AutomataDifference: 11.3s, 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, 5.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 834 GetRequests, 486 SyntacticMatches, 6 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 8.3s 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: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 67 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.0s 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...