/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:28:17,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:28:17,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:28:17,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:28:17,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:28:17,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:28:17,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:28:17,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:28:17,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:28:17,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:28:17,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:28:17,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:28:17,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:28:17,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:28:17,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:28:17,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:28:17,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:28:17,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:28:17,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:28:17,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:28:17,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:28:17,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:28:17,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:28:17,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:28:17,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:28:17,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:28:17,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:28:17,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:28:17,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:28:17,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:28:17,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:28:17,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:28:17,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:28:17,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:28:17,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:28:17,663 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:28:17,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:28:17,664 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:28:17,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:28:17,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:28:17,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:28:17,668 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 [2020-11-06 22:28:17,695 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:28:17,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:28:17,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:28:17,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:28:17,697 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:28:17,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:28:17,697 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:28:17,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:28:17,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:28:17,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:28:17,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:28:17,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:28:17,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:28:17,699 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:28:17,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:28:17,699 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:28:17,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:28:17,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:28:17,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:28:17,700 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:28:17,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:28:17,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:28:17,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:28:17,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:28:17,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:28:17,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:28:17,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:28:17,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:28:17,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:28:17,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:28:18,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:28:18,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:28:18,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:28:18,069 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:28:18,070 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:28:18,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-11-06 22:28:18,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f359587/29338e4ae807450fae05bcda0648d6a4/FLAG08be2b424 [2020-11-06 22:28:18,739 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:28:18,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-11-06 22:28:18,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f359587/29338e4ae807450fae05bcda0648d6a4/FLAG08be2b424 [2020-11-06 22:28:19,059 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f359587/29338e4ae807450fae05bcda0648d6a4 [2020-11-06 22:28:19,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:28:19,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:28:19,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:28:19,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:28:19,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:28:19,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:28:19" (1/1) ... [2020-11-06 22:28:19,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:19, skipping insertion in model container [2020-11-06 22:28:19,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:28:19" (1/1) ... [2020-11-06 22:28:19,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:28:19,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:28:19,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:28:19,465 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:28:19,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:28:19,621 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:28:19,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:19 WrapperNode [2020-11-06 22:28:19,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:28:19,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:28:19,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:28:19,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:28:19,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:19" (1/1) ... [2020-11-06 22:28:19,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:19" (1/1) ... [2020-11-06 22:28:19,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:19" (1/1) ... [2020-11-06 22:28:19,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:19" (1/1) ... [2020-11-06 22:28:19,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:19" (1/1) ... [2020-11-06 22:28:19,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:19" (1/1) ... [2020-11-06 22:28:19,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:19" (1/1) ... [2020-11-06 22:28:19,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:28:19,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:28:19,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:28:19,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:28:19,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:28:19,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:28:19,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:28:19,779 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:28:19,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-11-06 22:28:19,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-11-06 22:28:19,780 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-11-06 22:28:19,780 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-11-06 22:28:19,781 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-11-06 22:28:19,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:28:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:28:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:28:19,782 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:28:19,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:28:19,783 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-11-06 22:28:19,783 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-11-06 22:28:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-11-06 22:28:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-11-06 22:28:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-11-06 22:28:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-11-06 22:28:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-11-06 22:28:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-11-06 22:28:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-11-06 22:28:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-11-06 22:28:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-11-06 22:28:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-11-06 22:28:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-11-06 22:28:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-11-06 22:28:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-11-06 22:28:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-11-06 22:28:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-11-06 22:28:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-11-06 22:28:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-11-06 22:28:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-11-06 22:28:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-11-06 22:28:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-11-06 22:28:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-11-06 22:28:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-11-06 22:28:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-11-06 22:28:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-11-06 22:28:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-11-06 22:28:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-11-06 22:28:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-11-06 22:28:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-11-06 22:28:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-11-06 22:28:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-11-06 22:28:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-11-06 22:28:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-11-06 22:28:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-11-06 22:28:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-11-06 22:28:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-11-06 22:28:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-11-06 22:28:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-11-06 22:28:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-11-06 22:28:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-11-06 22:28:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-11-06 22:28:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-11-06 22:28:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-11-06 22:28:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-11-06 22:28:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-11-06 22:28:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-11-06 22:28:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-11-06 22:28:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-11-06 22:28:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-11-06 22:28:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-11-06 22:28:19,792 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-11-06 22:28:19,792 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-11-06 22:28:19,792 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-11-06 22:28:19,792 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-11-06 22:28:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-11-06 22:28:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-11-06 22:28:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-11-06 22:28:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-11-06 22:28:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-11-06 22:28:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-11-06 22:28:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-11-06 22:28:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-11-06 22:28:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-11-06 22:28:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-11-06 22:28:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-11-06 22:28:19,795 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-11-06 22:28:19,795 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-11-06 22:28:19,795 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-11-06 22:28:19,795 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-11-06 22:28:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-11-06 22:28:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-11-06 22:28:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-11-06 22:28:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-11-06 22:28:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-11-06 22:28:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-11-06 22:28:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-11-06 22:28:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-11-06 22:28:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-11-06 22:28:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-11-06 22:28:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-11-06 22:28:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-11-06 22:28:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-11-06 22:28:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-11-06 22:28:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-11-06 22:28:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-11-06 22:28:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-11-06 22:28:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-11-06 22:28:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-11-06 22:28:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-11-06 22:28:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-11-06 22:28:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-11-06 22:28:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-11-06 22:28:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-11-06 22:28:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-11-06 22:28:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-11-06 22:28:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-11-06 22:28:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-11-06 22:28:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-11-06 22:28:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-11-06 22:28:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-11-06 22:28:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-11-06 22:28:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:28:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-06 22:28:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-06 22:28:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-06 22:28:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-06 22:28:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-11-06 22:28:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-06 22:28:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-11-06 22:28:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-11-06 22:28:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-11-06 22:28:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-11-06 22:28:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-11-06 22:28:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-11-06 22:28:19,804 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-11-06 22:28:19,805 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-11-06 22:28:19,805 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-11-06 22:28:19,805 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-11-06 22:28:19,805 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-11-06 22:28:19,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:28:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-11-06 22:28:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-11-06 22:28:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-11-06 22:28:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-11-06 22:28:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:28:19,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:28:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:28:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-11-06 22:28:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:28:19,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:28:19,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:28:19,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-06 22:28:19,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-06 22:28:19,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:28:20,580 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:28:20,581 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:28:20,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:28:20 BoogieIcfgContainer [2020-11-06 22:28:20,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:28:20,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:28:20,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:28:20,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:28:20,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:28:19" (1/3) ... [2020-11-06 22:28:20,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab611df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:28:20, skipping insertion in model container [2020-11-06 22:28:20,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:19" (2/3) ... [2020-11-06 22:28:20,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab611df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:28:20, skipping insertion in model container [2020-11-06 22:28:20,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:28:20" (3/3) ... [2020-11-06 22:28:20,595 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-11-06 22:28:20,610 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:28:20,614 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:28:20,627 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:28:20,668 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:28:20,668 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:28:20,668 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:28:20,668 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:28:20,669 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:28:20,669 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:28:20,669 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:28:20,669 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:28:20,691 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-11-06 22:28:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:28:20,698 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:20,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:28:20,699 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:20,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1851277019, now seen corresponding path program 1 times [2020-11-06 22:28:20,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:20,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861655637] [2020-11-06 22:28:20,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:21,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:28:21,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861655637] [2020-11-06 22:28:21,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:28:21,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:28:21,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975278806] [2020-11-06 22:28:21,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:28:21,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:21,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:28:21,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:28:21,283 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 7 states. [2020-11-06 22:28:21,561 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-11-06 22:28:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:22,113 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2020-11-06 22:28:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:28:22,116 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-06 22:28:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:22,126 INFO L225 Difference]: With dead ends: 95 [2020-11-06 22:28:22,126 INFO L226 Difference]: Without dead ends: 45 [2020-11-06 22:28:22,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:28:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-06 22:28:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-11-06 22:28:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-06 22:28:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-11-06 22:28:22,182 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 14 [2020-11-06 22:28:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:22,182 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-11-06 22:28:22,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:28:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-11-06 22:28:22,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-06 22:28:22,184 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:22,185 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] [2020-11-06 22:28:22,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:28:22,185 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:22,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:22,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1540837999, now seen corresponding path program 1 times [2020-11-06 22:28:22,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:22,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841374349] [2020-11-06 22:28:22,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:22,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:22,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:22,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:22,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-06 22:28:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:22,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 22:28:22,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841374349] [2020-11-06 22:28:22,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:28:22,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-06 22:28:22,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099559262] [2020-11-06 22:28:22,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:28:22,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:22,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:28:22,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:28:22,482 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2020-11-06 22:28:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:22,759 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-11-06 22:28:22,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:28:22,759 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-11-06 22:28:22,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:22,762 INFO L225 Difference]: With dead ends: 71 [2020-11-06 22:28:22,762 INFO L226 Difference]: Without dead ends: 50 [2020-11-06 22:28:22,764 INFO L677 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 [2020-11-06 22:28:22,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-06 22:28:22,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-11-06 22:28:22,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-06 22:28:22,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-11-06 22:28:22,790 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 39 [2020-11-06 22:28:22,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:22,791 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-11-06 22:28:22,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:28:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-11-06 22:28:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-06 22:28:22,795 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:22,795 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, 1] [2020-11-06 22:28:22,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:28:22,797 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:22,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1035279374, now seen corresponding path program 1 times [2020-11-06 22:28:22,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:22,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496663745] [2020-11-06 22:28:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:22,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:22,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:23,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:23,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-06 22:28:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:23,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 22:28:23,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496663745] [2020-11-06 22:28:23,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386192406] [2020-11-06 22:28:23,085 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 [2020-11-06 22:28:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:23,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-06 22:28:23,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:28:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 22:28:23,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:28:23,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 20 [2020-11-06 22:28:23,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887221055] [2020-11-06 22:28:23,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:28:23,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:23,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:28:23,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-11-06 22:28:23,892 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 13 states. [2020-11-06 22:28:24,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:24,562 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-11-06 22:28:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-06 22:28:24,562 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-11-06 22:28:24,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:24,565 INFO L225 Difference]: With dead ends: 81 [2020-11-06 22:28:24,565 INFO L226 Difference]: Without dead ends: 77 [2020-11-06 22:28:24,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-11-06 22:28:24,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-06 22:28:24,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-11-06 22:28:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-06 22:28:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-11-06 22:28:24,587 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 39 [2020-11-06 22:28:24,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:24,588 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-11-06 22:28:24,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:28:24,588 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-11-06 22:28:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-06 22:28:24,590 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:24,590 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, 1] [2020-11-06 22:28:24,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:28:24,804 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:24,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1962936705, now seen corresponding path program 1 times [2020-11-06 22:28:24,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:24,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547679353] [2020-11-06 22:28:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:24,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:24,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:24,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:25,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-06 22:28:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:25,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:25,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-11-06 22:28:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 22:28:25,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547679353] [2020-11-06 22:28:25,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169559985] [2020-11-06 22:28:25,065 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 [2020-11-06 22:28:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:25,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-06 22:28:25,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:28:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 22:28:25,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:28:25,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 20] total 28 [2020-11-06 22:28:25,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170111119] [2020-11-06 22:28:25,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-06 22:28:25,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:25,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-06 22:28:25,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-11-06 22:28:25,797 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 28 states. [2020-11-06 22:28:27,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:27,626 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2020-11-06 22:28:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 22:28:27,627 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2020-11-06 22:28:27,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:27,628 INFO L225 Difference]: With dead ends: 119 [2020-11-06 22:28:27,629 INFO L226 Difference]: Without dead ends: 71 [2020-11-06 22:28:27,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=230, Invalid=1750, Unknown=0, NotChecked=0, Total=1980 [2020-11-06 22:28:27,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-06 22:28:27,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2020-11-06 22:28:27,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-06 22:28:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-11-06 22:28:27,647 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 46 [2020-11-06 22:28:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:27,647 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-11-06 22:28:27,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-06 22:28:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-11-06 22:28:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-06 22:28:27,649 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:27,649 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, 1] [2020-11-06 22:28:27,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:28:27,864 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:27,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:27,865 INFO L82 PathProgramCache]: Analyzing trace with hash -937444706, now seen corresponding path program 1 times [2020-11-06 22:28:27,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:27,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125852387] [2020-11-06 22:28:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-06 22:28:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-11-06 22:28:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:28:28,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125852387] [2020-11-06 22:28:28,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108167436] [2020-11-06 22:28:28,418 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 [2020-11-06 22:28:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-06 22:28:28,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:28:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:28:28,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:28:28,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 29 [2020-11-06 22:28:28,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705805074] [2020-11-06 22:28:28,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-06 22:28:28,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:28,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-06 22:28:28,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:28:28,882 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 29 states. [2020-11-06 22:28:30,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:30,504 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2020-11-06 22:28:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:28:30,504 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2020-11-06 22:28:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:30,507 INFO L225 Difference]: With dead ends: 82 [2020-11-06 22:28:30,507 INFO L226 Difference]: Without dead ends: 77 [2020-11-06 22:28:30,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2020-11-06 22:28:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-06 22:28:30,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-11-06 22:28:30,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-06 22:28:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-11-06 22:28:30,539 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 46 [2020-11-06 22:28:30,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:30,541 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-11-06 22:28:30,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-06 22:28:30,541 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-11-06 22:28:30,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-06 22:28:30,542 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:30,542 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, 1] [2020-11-06 22:28:30,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:28:30,747 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:30,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:30,748 INFO L82 PathProgramCache]: Analyzing trace with hash -257386336, now seen corresponding path program 1 times [2020-11-06 22:28:30,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:30,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246528342] [2020-11-06 22:28:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:30,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:30,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:30,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:31,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-06 22:28:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:31,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:31,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-11-06 22:28:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:28:31,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246528342] [2020-11-06 22:28:31,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689140089] [2020-11-06 22:28:31,104 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 [2020-11-06 22:28:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:31,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-06 22:28:31,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:28:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:28:31,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:28:31,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-11-06 22:28:31,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658025711] [2020-11-06 22:28:31,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-06 22:28:31,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:31,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-06 22:28:31,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2020-11-06 22:28:31,785 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 28 states. [2020-11-06 22:28:32,882 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:28:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:33,817 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2020-11-06 22:28:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 22:28:33,823 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2020-11-06 22:28:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:33,824 INFO L225 Difference]: With dead ends: 104 [2020-11-06 22:28:33,824 INFO L226 Difference]: Without dead ends: 81 [2020-11-06 22:28:33,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=309, Invalid=1583, Unknown=0, NotChecked=0, Total=1892 [2020-11-06 22:28:33,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-06 22:28:33,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2020-11-06 22:28:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-06 22:28:33,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-11-06 22:28:33,838 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 46 [2020-11-06 22:28:33,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:33,839 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-11-06 22:28:33,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-06 22:28:33,839 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-11-06 22:28:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-06 22:28:33,840 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:33,841 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, 1] [2020-11-06 22:28:34,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:28:34,056 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:34,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:34,057 INFO L82 PathProgramCache]: Analyzing trace with hash -460784880, now seen corresponding path program 1 times [2020-11-06 22:28:34,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:34,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054650539] [2020-11-06 22:28:34,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:34,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:34,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:34,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:34,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-06 22:28:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:34,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:34,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-11-06 22:28:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:34,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-06 22:28:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:34,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-11-06 22:28:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-06 22:28:34,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054650539] [2020-11-06 22:28:34,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904992988] [2020-11-06 22:28:34,461 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 [2020-11-06 22:28:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:34,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-06 22:28:34,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:28:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:28:35,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:28:35,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2020-11-06 22:28:35,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916795509] [2020-11-06 22:28:35,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-06 22:28:35,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:35,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-06 22:28:35,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1097, Unknown=0, NotChecked=0, Total=1190 [2020-11-06 22:28:35,300 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 35 states. [2020-11-06 22:28:37,095 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-11-06 22:28:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:37,830 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2020-11-06 22:28:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-06 22:28:37,833 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 58 [2020-11-06 22:28:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:37,834 INFO L225 Difference]: With dead ends: 107 [2020-11-06 22:28:37,834 INFO L226 Difference]: Without dead ends: 85 [2020-11-06 22:28:37,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=389, Invalid=3151, Unknown=0, NotChecked=0, Total=3540 [2020-11-06 22:28:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-06 22:28:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-11-06 22:28:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-06 22:28:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-11-06 22:28:37,857 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 58 [2020-11-06 22:28:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:37,857 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-11-06 22:28:37,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-06 22:28:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-11-06 22:28:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-06 22:28:37,859 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:37,859 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, 1] [2020-11-06 22:28:38,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-06 22:28:38,062 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash 219273490, now seen corresponding path program 1 times [2020-11-06 22:28:38,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:38,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621217570] [2020-11-06 22:28:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:38,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:38,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:38,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:38,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-06 22:28:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:38,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:38,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-11-06 22:28:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:38,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-06 22:28:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:38,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-11-06 22:28:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-06 22:28:38,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621217570] [2020-11-06 22:28:38,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175065087] [2020-11-06 22:28:38,588 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 [2020-11-06 22:28:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:38,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-06 22:28:38,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:28:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:28:39,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:28:39,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 31 [2020-11-06 22:28:39,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167107118] [2020-11-06 22:28:39,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-06 22:28:39,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:39,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-06 22:28:39,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-11-06 22:28:39,100 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 31 states. [2020-11-06 22:28:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:40,542 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-11-06 22:28:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:28:40,542 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 58 [2020-11-06 22:28:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:40,543 INFO L225 Difference]: With dead ends: 78 [2020-11-06 22:28:40,544 INFO L226 Difference]: Without dead ends: 74 [2020-11-06 22:28:40,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2020-11-06 22:28:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-06 22:28:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-11-06 22:28:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-06 22:28:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-11-06 22:28:40,556 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 58 [2020-11-06 22:28:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:40,557 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-11-06 22:28:40,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-06 22:28:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-11-06 22:28:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-06 22:28:40,558 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:40,558 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, 1] [2020-11-06 22:28:40,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:28:40,772 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:40,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:40,773 INFO L82 PathProgramCache]: Analyzing trace with hash -791843760, now seen corresponding path program 1 times [2020-11-06 22:28:40,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:40,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740686793] [2020-11-06 22:28:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:40,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:41,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:41,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:41,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-06 22:28:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:41,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 22:28:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:41,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-11-06 22:28:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:41,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-06 22:28:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:41,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-11-06 22:28:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:28:41,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740686793] [2020-11-06 22:28:41,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504748884] [2020-11-06 22:28:41,374 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 [2020-11-06 22:28:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:41,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-06 22:28:41,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:28:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-06 22:28:41,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:28:41,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2020-11-06 22:28:41,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586440180] [2020-11-06 22:28:41,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-06 22:28:41,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:41,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-06 22:28:41,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2020-11-06 22:28:41,883 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 28 states. [2020-11-06 22:28:43,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:43,607 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-11-06 22:28:43,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-06 22:28:43,608 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2020-11-06 22:28:43,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:43,609 INFO L225 Difference]: With dead ends: 83 [2020-11-06 22:28:43,610 INFO L226 Difference]: Without dead ends: 76 [2020-11-06 22:28:43,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2020-11-06 22:28:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-06 22:28:43,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-11-06 22:28:43,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-06 22:28:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-11-06 22:28:43,624 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 58 [2020-11-06 22:28:43,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:43,624 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-11-06 22:28:43,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-06 22:28:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-11-06 22:28:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-06 22:28:43,626 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:43,626 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, 1] [2020-11-06 22:28:43,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:28:43,841 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:43,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1240769085, now seen corresponding path program 1 times [2020-11-06 22:28:43,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:43,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83974699] [2020-11-06 22:28:43,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:28:43,864 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:28:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:28:43,884 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:28:43,931 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:28:43,931 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:28:43,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 22:28:43,991 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 61 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-11-06 22:28:43,992 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 62 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-11-06 22:28:44,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:28:44 BoogieIcfgContainer [2020-11-06 22:28:44,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:28:44,040 INFO L168 Benchmark]: Toolchain (without parser) took 24970.74 ms. Allocated memory was 160.4 MB in the beginning and 335.5 MB in the end (delta: 175.1 MB). Free memory was 134.3 MB in the beginning and 227.4 MB in the end (delta: -93.1 MB). Peak memory consumption was 83.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:44,040 INFO L168 Benchmark]: CDTParser took 1.33 ms. Allocated memory is still 160.4 MB. Free memory is still 131.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:28:44,041 INFO L168 Benchmark]: CACSL2BoogieTranslator took 544.47 ms. Allocated memory is still 160.4 MB. Free memory was 133.7 MB in the beginning and 109.8 MB in the end (delta: 23.9 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:44,042 INFO L168 Benchmark]: Boogie Preprocessor took 55.16 ms. Allocated memory is still 160.4 MB. Free memory was 109.8 MB in the beginning and 107.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:44,045 INFO L168 Benchmark]: RCFGBuilder took 904.27 ms. Allocated memory is still 160.4 MB. Free memory was 107.1 MB in the beginning and 100.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:44,046 INFO L168 Benchmark]: TraceAbstraction took 23451.42 ms. Allocated memory was 160.4 MB in the beginning and 335.5 MB in the end (delta: 175.1 MB). Free memory was 99.6 MB in the beginning and 227.4 MB in the end (delta: -127.7 MB). Peak memory consumption was 47.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:44,052 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.33 ms. Allocated memory is still 160.4 MB. Free memory is still 131.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 544.47 ms. Allocated memory is still 160.4 MB. Free memory was 133.7 MB in the beginning and 109.8 MB in the end (delta: 23.9 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.16 ms. Allocated memory is still 160.4 MB. Free memory was 109.8 MB in the beginning and 107.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 904.27 ms. Allocated memory is still 160.4 MB. Free memory was 107.1 MB in the beginning and 100.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 23451.42 ms. Allocated memory was 160.4 MB in the beginning and 335.5 MB in the end (delta: 175.1 MB). Free memory was 99.6 MB in the beginning and 227.4 MB in the end (delta: -127.7 MB). Peak memory consumption was 47.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 61 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 62 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: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L869] void * guard_malloc_counter = 0; [L889] struct list_head *elem = ((void *)0); [L902] static struct list_head head; VAL [\old(elem)=49, \old(elem)=53, \old(guard_malloc_counter)=60, \old(guard_malloc_counter)=51, \old(head)=null, \old(head)=null, elem={0:0}, guard_malloc_counter={0:0}, head={3:0}] [L905] 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}] [L906] 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}] [L881] 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}] [L873] (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] [L874] guard_malloc_counter++ [L875] COND FALSE !(!__VERIFIER_nondet_int()) [L877] 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] [L881] 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] [L881] return __getMemory(size); [L906] 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}] [L906] dev1 = my_malloc(sizeof(*dev1)) [L907] CALL, EXPR my_malloc(sizeof(*dev2)) 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}] [L881] 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}] [L873] (size > 0) ? (0) : __blast_assert () 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}, size=8] [L874] guard_malloc_counter++ [L875] COND FALSE !(!__VERIFIER_nondet_int()) [L877] return (void *) guard_malloc_counter; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, \result={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={3:0}, size=8] [L881] 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] [L881] return __getMemory(size); [L907] 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}] [L907] dev2 = my_malloc(sizeof(*dev2)) [L908] 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}] [L909] 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}] [L892] (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}] [L893] COND TRUE __VERIFIER_nondet_int() [L894] 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}] [L909] 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}] [L910] CALL list_add(dev1, &head) VAL [\old(elem)=2, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:2}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, new={0:1}] [L892] (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}] [L893] COND TRUE __VERIFIER_nondet_int() [L894] elem = new VAL [\old(elem)=2, \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={0:1}, new={0:1}] [L910] 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}] [L911] CALL list_del(dev2) VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, entry={0:2}, guard_malloc_counter={0:2}, head={3:0}] [L898] COND FALSE !(entry==elem) VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, entry={0:2}, entry={0:2}, guard_malloc_counter={0:2}, head={3:0}] [L911] 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}] [L912] CALL list_add(dev2, &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={0:2}] [L892] (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={0:2}, new={0:2}] [L893] COND FALSE !(__VERIFIER_nondet_int()) [L912] 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}] [L915] 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}] [L892] (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}] [L892] CALL __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}] [L8] CALL reach_error() 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}] [L3] __assert_fail("0", "rule60_list2.c_1.i", 3, "reach_error") 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}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.2s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 13.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 369 SDtfs, 620 SDslu, 1209 SDs, 0 SdLazy, 6998 SolverSat, 708 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 698 GetRequests, 377 SyntacticMatches, 2 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 10.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=9, 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, 9 MinimizatonAttempts, 66 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 820 NumberOfCodeBlocks, 820 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 739 ConstructedInterpolants, 0 QuantifiedInterpolants, 164331 SizeOfPredicates, 49 NumberOfNonLiveVariables, 2319 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 139/237 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...