/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:18:21,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:18:21,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:18:21,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:18:21,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:18:21,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:18:21,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:18:21,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:18:21,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:18:21,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:18:21,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:18:21,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:18:21,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:18:21,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:18:21,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:18:21,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:18:21,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:18:21,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:18:21,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:18:21,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:18:21,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:18:21,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:18:21,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:18:21,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:18:21,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:18:21,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:18:21,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:18:21,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:18:21,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:18:21,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:18:21,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:18:21,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:18:21,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:18:21,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:18:21,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:18:21,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:18:21,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:18:21,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:18:21,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:18:21,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:18:21,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:18:21,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:18:21,710 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:18:21,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:18:21,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:18:21,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:18:21,712 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:18:21,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:18:21,712 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:18:21,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:18:21,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:18:21,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:18:21,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:18:21,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:18:21,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:18:21,714 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:18:21,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:18:21,714 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:18:21,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:18:21,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:18:21,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:18:21,715 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:18:21,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:18:21,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:18:21,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:18:21,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:18:21,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:18:21,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:18:21,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:18:21,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:18:21,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:18:21,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:18:22,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:18:22,043 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:18:22,054 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:18:22,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:18:22,058 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:18:22,058 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-08-18 16:18:22,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d4d8914a/8f7280fb19a64da89e1634350d5d7511/FLAGa0adaa3e9 [2020-08-18 16:18:22,669 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:18:22,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-08-18 16:18:22,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d4d8914a/8f7280fb19a64da89e1634350d5d7511/FLAGa0adaa3e9 [2020-08-18 16:18:22,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d4d8914a/8f7280fb19a64da89e1634350d5d7511 [2020-08-18 16:18:22,960 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:18:22,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:18:22,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:18:22,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:18:22,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:18:22,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:18:22" (1/1) ... [2020-08-18 16:18:22,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb1485c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:22, skipping insertion in model container [2020-08-18 16:18:22,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:18:22" (1/1) ... [2020-08-18 16:18:22,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:18:23,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:18:23,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:18:23,545 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:18:23,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:18:23,695 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:18:23,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:23 WrapperNode [2020-08-18 16:18:23,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:18:23,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:18:23,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:18:23,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:18:23,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:23" (1/1) ... [2020-08-18 16:18:23,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:23" (1/1) ... [2020-08-18 16:18:23,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:23" (1/1) ... [2020-08-18 16:18:23,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:23" (1/1) ... [2020-08-18 16:18:23,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:23" (1/1) ... [2020-08-18 16:18:23,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:23" (1/1) ... [2020-08-18 16:18:23,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:23" (1/1) ... [2020-08-18 16:18:23,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:18:23,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:18:23,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:18:23,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:18:23,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:18:23,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:18:23,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:18:23,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:18:23,887 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 16:18:23,888 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 16:18:23,888 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 16:18:23,889 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 16:18:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 16:18:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 16:18:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 16:18:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 16:18:23,891 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 16:18:23,891 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 16:18:23,891 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 16:18:23,892 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 16:18:23,892 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 16:18:23,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 16:18:23,893 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 16:18:23,893 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 16:18:23,893 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 16:18:23,894 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 16:18:23,894 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 16:18:23,895 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 16:18:23,895 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 16:18:23,895 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 16:18:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 16:18:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 16:18:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 16:18:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 16:18:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 16:18:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 16:18:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 16:18:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 16:18:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 16:18:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 16:18:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 16:18:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 16:18:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 16:18:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 16:18:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 16:18:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 16:18:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 16:18:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 16:18:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 16:18:23,901 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 16:18:23,901 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 16:18:23,901 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 16:18:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 16:18:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 16:18:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 16:18:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 16:18:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 16:18:23,903 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 16:18:23,903 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:18:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 16:18:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 16:18:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 16:18:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 16:18:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 16:18:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 16:18:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 16:18:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 16:18:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 16:18:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 16:18:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 16:18:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 16:18:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 16:18:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 16:18:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 16:18:23,908 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 16:18:23,908 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 16:18:23,908 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 16:18:23,909 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 16:18:23,909 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 16:18:23,909 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 16:18:23,909 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 16:18:23,910 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 16:18:23,910 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 16:18:23,910 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 16:18:23,910 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 16:18:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 16:18:23,912 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 16:18:23,912 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 16:18:23,912 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 16:18:23,912 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 16:18:23,912 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 16:18:23,912 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 16:18:23,913 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 16:18:23,913 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 16:18:23,914 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 16:18:23,914 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 16:18:23,914 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 16:18:23,914 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 16:18:23,914 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 16:18:23,914 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 16:18:23,914 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 16:18:23,915 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 16:18:23,915 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 16:18:23,915 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 16:18:23,915 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 16:18:23,915 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 16:18:23,915 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 16:18:23,915 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 16:18:23,916 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 16:18:23,916 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 16:18:23,916 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 16:18:23,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:18:23,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:18:23,916 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:18:23,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:18:23,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:18:23,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 16:18:23,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 16:18:23,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:18:23,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:18:23,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:18:23,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:18:24,501 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:18:24,502 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-08-18 16:18:24,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:18:24 BoogieIcfgContainer [2020-08-18 16:18:24,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:18:24,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:18:24,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:18:24,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:18:24,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:18:22" (1/3) ... [2020-08-18 16:18:24,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459cc243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:18:24, skipping insertion in model container [2020-08-18 16:18:24,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:23" (2/3) ... [2020-08-18 16:18:24,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459cc243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:18:24, skipping insertion in model container [2020-08-18 16:18:24,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:18:24" (3/3) ... [2020-08-18 16:18:24,516 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2020-08-18 16:18:24,528 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:18:24,535 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-08-18 16:18:24,551 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-08-18 16:18:24,577 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:18:24,577 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:18:24,577 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:18:24,577 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:18:24,579 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:18:24,579 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:18:24,579 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:18:24,579 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:18:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-18 16:18:24,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 16:18:24,621 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:24,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:24,624 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:24,632 INFO L82 PathProgramCache]: Analyzing trace with hash -742552803, now seen corresponding path program 1 times [2020-08-18 16:18:24,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:24,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442634787] [2020-08-18 16:18:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:24,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:24,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442634787] [2020-08-18 16:18:24,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:24,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:18:24,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110785302] [2020-08-18 16:18:24,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:18:24,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:24,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:18:24,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:18:24,879 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-18 16:18:25,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:25,001 INFO L93 Difference]: Finished difference Result 67 states and 104 transitions. [2020-08-18 16:18:25,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:18:25,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-18 16:18:25,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:25,013 INFO L225 Difference]: With dead ends: 67 [2020-08-18 16:18:25,014 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 16:18:25,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:18:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 16:18:25,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-18 16:18:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 16:18:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-08-18 16:18:25,057 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 10 [2020-08-18 16:18:25,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:25,057 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-08-18 16:18:25,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:18:25,058 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-08-18 16:18:25,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 16:18:25,058 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:25,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:25,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:18:25,075 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:25,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:25,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1556669446, now seen corresponding path program 1 times [2020-08-18 16:18:25,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:25,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348943944] [2020-08-18 16:18:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:25,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:25,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348943944] [2020-08-18 16:18:25,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:25,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:18:25,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70732395] [2020-08-18 16:18:25,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:18:25,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:25,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:18:25,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:18:25,212 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2020-08-18 16:18:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:25,334 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-08-18 16:18:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:18:25,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-18 16:18:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:25,336 INFO L225 Difference]: With dead ends: 37 [2020-08-18 16:18:25,336 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 16:18:25,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:18:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 16:18:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-08-18 16:18:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 16:18:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-08-18 16:18:25,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2020-08-18 16:18:25,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:25,345 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-08-18 16:18:25,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:18:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-08-18 16:18:25,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 16:18:25,345 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:25,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:25,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:18:25,346 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:25,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:25,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1973625457, now seen corresponding path program 1 times [2020-08-18 16:18:25,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:25,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512873746] [2020-08-18 16:18:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:25,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:25,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512873746] [2020-08-18 16:18:25,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:25,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:18:25,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066067660] [2020-08-18 16:18:25,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:18:25,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:25,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:18:25,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:18:25,470 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-08-18 16:18:25,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:25,619 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-08-18 16:18:25,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 16:18:25,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-18 16:18:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:25,620 INFO L225 Difference]: With dead ends: 54 [2020-08-18 16:18:25,621 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 16:18:25,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:18:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 16:18:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2020-08-18 16:18:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 16:18:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-08-18 16:18:25,630 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 14 [2020-08-18 16:18:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:25,630 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-08-18 16:18:25,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:18:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-08-18 16:18:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 16:18:25,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:25,631 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:25,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:18:25,632 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:25,632 INFO L82 PathProgramCache]: Analyzing trace with hash -954667545, now seen corresponding path program 1 times [2020-08-18 16:18:25,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:25,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095994033] [2020-08-18 16:18:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:25,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:25,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095994033] [2020-08-18 16:18:25,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:18:25,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 16:18:25,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573960839] [2020-08-18 16:18:25,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:18:25,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:25,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:18:25,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:18:25,882 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-08-18 16:18:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:26,109 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-08-18 16:18:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 16:18:26,110 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-08-18 16:18:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:26,111 INFO L225 Difference]: With dead ends: 39 [2020-08-18 16:18:26,111 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 16:18:26,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:18:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 16:18:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2020-08-18 16:18:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 16:18:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-18 16:18:26,118 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-08-18 16:18:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:26,118 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-18 16:18:26,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:18:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-18 16:18:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 16:18:26,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:26,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:26,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:18:26,120 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:26,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash 903516662, now seen corresponding path program 1 times [2020-08-18 16:18:26,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:26,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007862471] [2020-08-18 16:18:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:26,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:26,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007862471] [2020-08-18 16:18:26,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:26,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:18:26,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672663072] [2020-08-18 16:18:26,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:18:26,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:26,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:18:26,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:18:26,249 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-08-18 16:18:26,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:26,369 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-08-18 16:18:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:18:26,369 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-18 16:18:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:26,370 INFO L225 Difference]: With dead ends: 42 [2020-08-18 16:18:26,370 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 16:18:26,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:18:26,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 16:18:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-18 16:18:26,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 16:18:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-08-18 16:18:26,377 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2020-08-18 16:18:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:26,377 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-08-18 16:18:26,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:18:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-08-18 16:18:26,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 16:18:26,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:26,379 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:26,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:18:26,379 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:26,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1223911862, now seen corresponding path program 1 times [2020-08-18 16:18:26,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:26,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423244218] [2020-08-18 16:18:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:26,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:26,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423244218] [2020-08-18 16:18:26,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:18:26,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 16:18:26,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365327912] [2020-08-18 16:18:26,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:18:26,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:26,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:18:26,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:18:26,472 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-08-18 16:18:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:26,600 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-08-18 16:18:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 16:18:26,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-08-18 16:18:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:26,601 INFO L225 Difference]: With dead ends: 53 [2020-08-18 16:18:26,601 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 16:18:26,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:18:26,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 16:18:26,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-18 16:18:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 16:18:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-08-18 16:18:26,607 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 21 [2020-08-18 16:18:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:26,608 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-08-18 16:18:26,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:18:26,608 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-08-18 16:18:26,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:18:26,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:26,609 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:26,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:18:26,609 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:26,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:26,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1223476830, now seen corresponding path program 1 times [2020-08-18 16:18:26,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:26,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033584588] [2020-08-18 16:18:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:26,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:26,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033584588] [2020-08-18 16:18:26,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:18:26,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 16:18:26,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30333714] [2020-08-18 16:18:26,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 16:18:26,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:26,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 16:18:26,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:18:26,863 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 11 states. [2020-08-18 16:18:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:27,646 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-08-18 16:18:27,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 16:18:27,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-08-18 16:18:27,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:27,648 INFO L225 Difference]: With dead ends: 77 [2020-08-18 16:18:27,648 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 16:18:27,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-08-18 16:18:27,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 16:18:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2020-08-18 16:18:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 16:18:27,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-08-18 16:18:27,663 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2020-08-18 16:18:27,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:27,663 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-08-18 16:18:27,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 16:18:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-08-18 16:18:27,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:18:27,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:27,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:27,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:18:27,665 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:27,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2050422112, now seen corresponding path program 1 times [2020-08-18 16:18:27,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:27,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447048464] [2020-08-18 16:18:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:27,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:27,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447048464] [2020-08-18 16:18:27,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:18:27,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 16:18:27,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922245370] [2020-08-18 16:18:27,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 16:18:27,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:27,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 16:18:27,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-18 16:18:27,981 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 13 states. [2020-08-18 16:18:28,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:28,558 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-18 16:18:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 16:18:28,559 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-08-18 16:18:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:28,562 INFO L225 Difference]: With dead ends: 84 [2020-08-18 16:18:28,562 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 16:18:28,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-08-18 16:18:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 16:18:28,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-08-18 16:18:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 16:18:28,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-08-18 16:18:28,581 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 24 [2020-08-18 16:18:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:28,582 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-08-18 16:18:28,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 16:18:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-08-18 16:18:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:18:28,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:28,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:28,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 16:18:28,583 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:28,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:28,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1509760762, now seen corresponding path program 1 times [2020-08-18 16:18:28,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:28,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804138184] [2020-08-18 16:18:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:18:28,626 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:18:28,626 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:18:28,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 16:18:28,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:18:28 BoogieIcfgContainer [2020-08-18 16:18:28,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:18:28,659 INFO L168 Benchmark]: Toolchain (without parser) took 5696.77 ms. Allocated memory was 138.4 MB in the beginning and 291.0 MB in the end (delta: 152.6 MB). Free memory was 100.0 MB in the beginning and 253.9 MB in the end (delta: -153.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:18:28,660 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 16:18:28,661 INFO L168 Benchmark]: CACSL2BoogieTranslator took 734.42 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 99.8 MB in the beginning and 167.1 MB in the end (delta: -67.3 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:28,661 INFO L168 Benchmark]: Boogie Preprocessor took 121.52 ms. Allocated memory is still 200.8 MB. Free memory was 167.1 MB in the beginning and 164.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:28,662 INFO L168 Benchmark]: RCFGBuilder took 686.18 ms. Allocated memory is still 200.8 MB. Free memory was 164.3 MB in the beginning and 117.2 MB in the end (delta: 47.2 MB). Peak memory consumption was 47.2 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:28,663 INFO L168 Benchmark]: TraceAbstraction took 4149.92 ms. Allocated memory was 200.8 MB in the beginning and 291.0 MB in the end (delta: 90.2 MB). Free memory was 116.5 MB in the beginning and 253.9 MB in the end (delta: -137.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:18:28,666 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 734.42 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 99.8 MB in the beginning and 167.1 MB in the end (delta: -67.3 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.52 ms. Allocated memory is still 200.8 MB. Free memory was 167.1 MB in the beginning and 164.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 686.18 ms. Allocated memory is still 200.8 MB. Free memory was 164.3 MB in the beginning and 117.2 MB in the end (delta: 47.2 MB). Peak memory consumption was 47.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4149.92 ms. Allocated memory was 200.8 MB in the beginning and 291.0 MB in the end (delta: 90.2 MB). Free memory was 116.5 MB in the beginning and 253.9 MB in the end (delta: -137.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1039]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L994] SLL* null = malloc(sizeof(SLL)); [L995] null->colour = BLACK [L996] null->next = ((void*)0) [L998] SLL* list = malloc(sizeof(SLL)); [L999] list->next = null [L1000] list->colour = BLACK [L1002] SLL* end = list; [L1005] COND TRUE __VERIFIER_nondet_int() [L1008] end->next = malloc(sizeof(SLL)) [L1009] EXPR end->next [L1009] end = end->next [L1010] end->next = null [L1012] COND FALSE !(__VERIFIER_nondet_int()) [L1018] end->colour = RED [L1019] end->next = malloc(sizeof(SLL)) [L1020] EXPR end->next [L1020] end = end->next [L1021] end->next = null [L1022] end->colour = BLACK [L1005] COND FALSE !(__VERIFIER_nondet_int()) [L1026] end = null [L1027] end = list [L1030] COND FALSE !(!(null != end)) [L1031] EXPR end->colour [L1031] COND FALSE !(!(BLACK == end->colour)) [L1033] COND TRUE null != end [L1035] EXPR end->colour [L1035] COND FALSE !(RED == end->colour) [L1042] EXPR end->next [L1042] end = end->next [L1033] COND TRUE null != end [L1035] EXPR end->colour [L1035] COND TRUE RED == end->colour [L1037] EXPR end->next [L1037] end = end->next [L1038] COND FALSE !(!(null != end)) [L1039] EXPR end->colour [L1039] COND TRUE !(BLACK != end->colour) [L1039] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.0s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 203 SDtfs, 211 SDslu, 599 SDs, 0 SdLazy, 845 SolverSat, 100 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 77 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 166 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 28462 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 1/12 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...