/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 --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=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 0.1.25-177f698 [2020-08-21 17:22:05,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:22:05,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:22:05,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:22:05,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:22:05,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:22:05,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:22:05,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:22:05,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:22:05,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:22:05,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:22:05,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:22:05,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:22:05,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:22:05,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:22:05,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:22:05,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:22:05,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:22:05,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:22:05,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:22:05,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:22:05,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:22:05,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:22:05,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:22:05,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:22:05,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:22:05,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:22:05,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:22:05,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:22:05,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:22:05,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:22:05,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:22:05,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:22:05,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:22:05,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:22:05,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:22:05,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:22:05,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:22:05,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:22:05,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:22:05,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:22:05,897 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 [2020-08-21 17:22:05,920 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:22:05,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:22:05,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:22:05,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:22:05,922 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:22:05,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:22:05,923 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:22:05,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:22:05,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:22:05,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:22:05,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:22:05,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:22:05,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:22:05,924 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:22:05,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:22:05,925 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:22:05,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:22:05,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:22:05,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:22:05,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:22:05,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:22:05,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:22:05,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:22:05,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:22:05,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:22:05,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:22:05,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:22:05,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:22:05,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:22:05,927 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:22:06,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:22:06,277 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:22:06,285 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:22:06,288 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:22:06,290 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:22:06,291 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-08-21 17:22:06,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df8f160c7/5964bca0a69443beb3cf61b58ed5a17b/FLAG949745a02 [2020-08-21 17:22:06,920 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:22:06,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-08-21 17:22:06,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df8f160c7/5964bca0a69443beb3cf61b58ed5a17b/FLAG949745a02 [2020-08-21 17:22:07,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df8f160c7/5964bca0a69443beb3cf61b58ed5a17b [2020-08-21 17:22:07,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:22:07,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:22:07,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:22:07,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:22:07,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:22:07,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:22:07" (1/1) ... [2020-08-21 17:22:07,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a529ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:22:07, skipping insertion in model container [2020-08-21 17:22:07,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:22:07" (1/1) ... [2020-08-21 17:22:07,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:22:07,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:22:07,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:22:07,812 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:22:07,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:22:07,932 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:22:07,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:22:07 WrapperNode [2020-08-21 17:22:07,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:22:07,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:22:07,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:22:07,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:22:07,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:22:07" (1/1) ... [2020-08-21 17:22:07,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:22:07" (1/1) ... [2020-08-21 17:22:07,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:22:07" (1/1) ... [2020-08-21 17:22:07,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:22:07" (1/1) ... [2020-08-21 17:22:07,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:22:07" (1/1) ... [2020-08-21 17:22:07,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:22:07" (1/1) ... [2020-08-21 17:22:07,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:22:07" (1/1) ... [2020-08-21 17:22:07,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:22:08,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:22:08,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:22:08,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:22:08,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:22:07" (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 [2020-08-21 17:22:08,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:22:08,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:22:08,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:22:08,065 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 17:22:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 17:22:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 17:22:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 17:22:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 17:22:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 17:22:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 17:22:08,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 17:22:08,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 17:22:08,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 17:22:08,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 17:22:08,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 17:22:08,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 17:22:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 17:22:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 17:22:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 17:22:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 17:22:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 17:22:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 17:22:08,069 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 17:22:08,069 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 17:22:08,069 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 17:22:08,069 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 17:22:08,069 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 17:22:08,069 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 17:22:08,070 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 17:22:08,070 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 17:22:08,070 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 17:22:08,070 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 17:22:08,070 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 17:22:08,070 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 17:22:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 17:22:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 17:22:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 17:22:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 17:22:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 17:22:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 17:22:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 17:22:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 17:22:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 17:22:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 17:22:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 17:22:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 17:22:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 17:22:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 17:22:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 17:22:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 17:22:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 17:22:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 17:22:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 17:22:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 17:22:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 17:22:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 17:22:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 17:22:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 17:22:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 17:22:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 17:22:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 17:22:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 17:22:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 17:22:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 17:22:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 17:22:08,076 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 17:22:08,076 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 17:22:08,076 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 17:22:08,076 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 17:22:08,076 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 17:22:08,076 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 17:22:08,077 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 17:22:08,077 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 17:22:08,077 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 17:22:08,077 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 17:22:08,077 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 17:22:08,077 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 17:22:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 17:22:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 17:22:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 17:22:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 17:22:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 17:22:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 17:22:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 17:22:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 17:22:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 17:22:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 17:22:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 17:22:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 17:22:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 17:22:08,080 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 17:22:08,080 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 17:22:08,080 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 17:22:08,080 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 17:22:08,080 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 17:22:08,080 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 17:22:08,080 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 17:22:08,081 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 17:22:08,081 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 17:22:08,081 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 17:22:08,081 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 17:22:08,081 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 17:22:08,081 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 17:22:08,081 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 17:22:08,082 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 17:22:08,082 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 17:22:08,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:22:08,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:22:08,082 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:22:08,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 17:22:08,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 17:22:08,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 17:22:08,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 17:22:08,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 17:22:08,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 17:22:08,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:22:08,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:22:08,678 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:22:08,678 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-08-21 17:22:08,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:22:08 BoogieIcfgContainer [2020-08-21 17:22:08,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:22:08,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:22:08,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:22:08,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:22:08,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:22:07" (1/3) ... [2020-08-21 17:22:08,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb49693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:22:08, skipping insertion in model container [2020-08-21 17:22:08,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:22:07" (2/3) ... [2020-08-21 17:22:08,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb49693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:22:08, skipping insertion in model container [2020-08-21 17:22:08,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:22:08" (3/3) ... [2020-08-21 17:22:08,695 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2020-08-21 17:22:08,705 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:22:08,713 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-08-21 17:22:08,728 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-08-21 17:22:08,755 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:22:08,755 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:22:08,755 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:22:08,755 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:22:08,756 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:22:08,756 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:22:08,756 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:22:08,756 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:22:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-21 17:22:08,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 17:22:08,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:22:08,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:22:08,786 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:22:08,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:22:08,791 INFO L82 PathProgramCache]: Analyzing trace with hash -742552803, now seen corresponding path program 1 times [2020-08-21 17:22:08,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:22:08,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550028255] [2020-08-21 17:22:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:22:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:09,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:22:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:22:09,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550028255] [2020-08-21 17:22:09,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:22:09,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:22:09,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40133703] [2020-08-21 17:22:09,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:22:09,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:22:09,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:22:09,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:22:09,049 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-21 17:22:09,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:22:09,181 INFO L93 Difference]: Finished difference Result 67 states and 104 transitions. [2020-08-21 17:22:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:22:09,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-21 17:22:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:22:09,193 INFO L225 Difference]: With dead ends: 67 [2020-08-21 17:22:09,194 INFO L226 Difference]: Without dead ends: 31 [2020-08-21 17:22:09,197 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 [2020-08-21 17:22:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-21 17:22:09,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-21 17:22:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 17:22:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-08-21 17:22:09,254 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 10 [2020-08-21 17:22:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:22:09,255 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-08-21 17:22:09,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:22:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-08-21 17:22:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 17:22:09,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:22:09,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:22:09,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:22:09,257 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:22:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:22:09,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1556669446, now seen corresponding path program 1 times [2020-08-21 17:22:09,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:22:09,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448366242] [2020-08-21 17:22:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:22:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:09,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:22:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:22:09,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448366242] [2020-08-21 17:22:09,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:22:09,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:22:09,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371363837] [2020-08-21 17:22:09,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:22:09,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:22:09,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:22:09,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:22:09,371 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2020-08-21 17:22:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:22:09,483 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-08-21 17:22:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:22:09,484 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-21 17:22:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:22:09,485 INFO L225 Difference]: With dead ends: 37 [2020-08-21 17:22:09,485 INFO L226 Difference]: Without dead ends: 35 [2020-08-21 17:22:09,486 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 [2020-08-21 17:22:09,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-21 17:22:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-08-21 17:22:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 17:22:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-08-21 17:22:09,493 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2020-08-21 17:22:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:22:09,493 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-08-21 17:22:09,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:22:09,494 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-08-21 17:22:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 17:22:09,494 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:22:09,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:22:09,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:22:09,495 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:22:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:22:09,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1973625457, now seen corresponding path program 1 times [2020-08-21 17:22:09,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:22:09,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333475478] [2020-08-21 17:22:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:22:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:09,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:22:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:22:09,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333475478] [2020-08-21 17:22:09,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:22:09,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:22:09,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766027299] [2020-08-21 17:22:09,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:22:09,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:22:09,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:22:09,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:22:09,709 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-08-21 17:22:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:22:09,896 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-08-21 17:22:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:22:09,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-21 17:22:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:22:09,899 INFO L225 Difference]: With dead ends: 54 [2020-08-21 17:22:09,899 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 17:22:09,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:22:09,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 17:22:09,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2020-08-21 17:22:09,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 17:22:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-08-21 17:22:09,913 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 14 [2020-08-21 17:22:09,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:22:09,914 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-08-21 17:22:09,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:22:09,916 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-08-21 17:22:09,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 17:22:09,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:22:09,918 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:22:09,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:22:09,918 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:22:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:22:09,919 INFO L82 PathProgramCache]: Analyzing trace with hash -954667545, now seen corresponding path program 1 times [2020-08-21 17:22:09,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:22:09,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302126870] [2020-08-21 17:22:09,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:22:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:10,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:22:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:22:10,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302126870] [2020-08-21 17:22:10,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:22:10,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 17:22:10,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076585905] [2020-08-21 17:22:10,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:22:10,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:22:10,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:22:10,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:22:10,137 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-08-21 17:22:10,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:22:10,357 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-08-21 17:22:10,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 17:22:10,358 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-08-21 17:22:10,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:22:10,358 INFO L225 Difference]: With dead ends: 39 [2020-08-21 17:22:10,359 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 17:22:10,359 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 [2020-08-21 17:22:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 17:22:10,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2020-08-21 17:22:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 17:22:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-21 17:22:10,365 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-08-21 17:22:10,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:22:10,365 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-21 17:22:10,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:22:10,366 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-21 17:22:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 17:22:10,366 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:22:10,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:22:10,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:22:10,367 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:22:10,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:22:10,367 INFO L82 PathProgramCache]: Analyzing trace with hash 903516662, now seen corresponding path program 1 times [2020-08-21 17:22:10,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:22:10,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566208270] [2020-08-21 17:22:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:22:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:10,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:22:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:22:10,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566208270] [2020-08-21 17:22:10,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:22:10,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:22:10,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570377953] [2020-08-21 17:22:10,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:22:10,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:22:10,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:22:10,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:22:10,532 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-08-21 17:22:10,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:22:10,658 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-08-21 17:22:10,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:22:10,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-21 17:22:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:22:10,660 INFO L225 Difference]: With dead ends: 42 [2020-08-21 17:22:10,660 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 17:22:10,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:22:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 17:22:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-21 17:22:10,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 17:22:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-08-21 17:22:10,672 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2020-08-21 17:22:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:22:10,673 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-08-21 17:22:10,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:22:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-08-21 17:22:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 17:22:10,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:22:10,676 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] [2020-08-21 17:22:10,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:22:10,678 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:22:10,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:22:10,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1223911862, now seen corresponding path program 1 times [2020-08-21 17:22:10,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:22:10,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762364640] [2020-08-21 17:22:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:22:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:10,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:22:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:22:10,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762364640] [2020-08-21 17:22:10,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:22:10,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 17:22:10,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447512505] [2020-08-21 17:22:10,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:22:10,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:22:10,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:22:10,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:22:10,823 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-08-21 17:22:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:22:10,988 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-08-21 17:22:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:22:10,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-08-21 17:22:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:22:10,990 INFO L225 Difference]: With dead ends: 53 [2020-08-21 17:22:10,990 INFO L226 Difference]: Without dead ends: 31 [2020-08-21 17:22:10,992 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 [2020-08-21 17:22:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-21 17:22:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-21 17:22:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 17:22:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-08-21 17:22:11,000 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 21 [2020-08-21 17:22:11,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:22:11,001 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-08-21 17:22:11,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:22:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-08-21 17:22:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 17:22:11,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:22:11,002 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] [2020-08-21 17:22:11,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:22:11,003 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:22:11,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:22:11,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1223476830, now seen corresponding path program 1 times [2020-08-21 17:22:11,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:22:11,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207997992] [2020-08-21 17:22:11,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:22:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:11,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:22:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:22:11,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207997992] [2020-08-21 17:22:11,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:22:11,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 17:22:11,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166541644] [2020-08-21 17:22:11,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 17:22:11,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:22:11,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 17:22:11,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:22:11,290 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 11 states. [2020-08-21 17:22:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:22:12,115 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-08-21 17:22:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:22:12,116 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-08-21 17:22:12,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:22:12,117 INFO L225 Difference]: With dead ends: 77 [2020-08-21 17:22:12,117 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 17:22:12,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-08-21 17:22:12,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 17:22:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2020-08-21 17:22:12,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 17:22:12,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-08-21 17:22:12,134 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2020-08-21 17:22:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:22:12,134 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-08-21 17:22:12,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 17:22:12,135 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-08-21 17:22:12,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 17:22:12,136 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:22:12,137 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] [2020-08-21 17:22:12,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:22:12,137 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:22:12,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:22:12,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2050422112, now seen corresponding path program 1 times [2020-08-21 17:22:12,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:22:12,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553023766] [2020-08-21 17:22:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:22:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:12,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:22:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:22:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:22:12,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553023766] [2020-08-21 17:22:12,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:22:12,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 17:22:12,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71470045] [2020-08-21 17:22:12,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:22:12,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:22:12,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:22:12,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:22:12,444 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 13 states. [2020-08-21 17:22:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:22:13,025 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-21 17:22:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 17:22:13,025 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-08-21 17:22:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:22:13,028 INFO L225 Difference]: With dead ends: 84 [2020-08-21 17:22:13,028 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 17:22:13,029 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 [2020-08-21 17:22:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 17:22:13,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-08-21 17:22:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 17:22:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-08-21 17:22:13,040 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 24 [2020-08-21 17:22:13,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:22:13,040 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-08-21 17:22:13,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:22:13,041 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-08-21 17:22:13,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 17:22:13,042 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:22:13,042 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] [2020-08-21 17:22:13,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:22:13,042 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:22:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:22:13,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1509760762, now seen corresponding path program 1 times [2020-08-21 17:22:13,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:22:13,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329130055] [2020-08-21 17:22:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:22:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 17:22:13,071 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 17:22:13,072 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 17:22:13,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:22:13,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:22:13 BoogieIcfgContainer [2020-08-21 17:22:13,096 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:22:13,099 INFO L168 Benchmark]: Toolchain (without parser) took 5899.30 ms. Allocated memory was 139.5 MB in the beginning and 285.7 MB in the end (delta: 146.3 MB). Free memory was 101.7 MB in the beginning and 237.3 MB in the end (delta: -135.6 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:22:13,100 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 17:22:13,101 INFO L168 Benchmark]: CACSL2BoogieTranslator took 731.00 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.5 MB in the beginning and 169.6 MB in the end (delta: -68.1 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:22:13,102 INFO L168 Benchmark]: Boogie Preprocessor took 65.94 ms. Allocated memory is still 202.4 MB. Free memory was 169.6 MB in the beginning and 166.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:22:13,103 INFO L168 Benchmark]: RCFGBuilder took 683.35 ms. Allocated memory is still 202.4 MB. Free memory was 166.8 MB in the beginning and 119.2 MB in the end (delta: 47.6 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. [2020-08-21 17:22:13,104 INFO L168 Benchmark]: TraceAbstraction took 4411.58 ms. Allocated memory was 202.4 MB in the beginning and 285.7 MB in the end (delta: 83.4 MB). Free memory was 119.2 MB in the beginning and 237.3 MB in the end (delta: -118.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 17:22:13,107 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 731.00 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.5 MB in the beginning and 169.6 MB in the end (delta: -68.1 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.94 ms. Allocated memory is still 202.4 MB. Free memory was 169.6 MB in the beginning and 166.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 683.35 ms. Allocated memory is still 202.4 MB. Free memory was 166.8 MB in the beginning and 119.2 MB in the end (delta: 47.6 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4411.58 ms. Allocated memory was 202.4 MB in the beginning and 285.7 MB in the end (delta: 83.4 MB). Free memory was 119.2 MB in the beginning and 237.3 MB in the end (delta: -118.1 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: 4.3s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 2.4s, 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, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.5s 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 77 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s 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...