/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:07:53,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:07:53,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:07:53,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:07:53,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:07:53,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:07:53,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:07:53,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:07:53,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:07:53,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:07:53,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:07:53,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:07:53,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:07:53,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:07:53,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:07:53,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:07:53,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:07:53,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:07:53,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:07:53,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:07:53,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:07:53,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:07:53,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:07:53,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:07:53,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:07:53,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:07:53,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:07:53,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:07:53,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:07:53,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:07:53,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:07:53,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:07:53,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:07:53,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:07:53,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:07:53,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:07:53,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:07:53,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:07:53,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:07:53,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:07:53,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:07:53,949 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 21:07:53,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:07:53,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:07:53,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:07:53,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:07:53,987 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:07:53,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:07:53,988 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:07:53,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:07:53,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:07:53,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:07:53,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:07:53,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:07:53,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:07:53,990 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:07:53,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:07:53,990 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:07:53,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:07:53,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:07:53,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:07:53,991 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:07:53,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:07:53,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:07:53,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:07:53,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:07:53,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:07:53,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:07:53,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:07:53,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:07:53,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:07:53,994 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=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:07:54,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:07:54,285 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:07:54,288 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:07:54,290 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:07:54,290 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:07:54,291 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-18 21:07:54,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c6490379/4588704757f748198bfb11b1585d78ee/FLAG408f55e22 [2020-08-18 21:07:54,879 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:07:54,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-18 21:07:54,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c6490379/4588704757f748198bfb11b1585d78ee/FLAG408f55e22 [2020-08-18 21:07:55,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c6490379/4588704757f748198bfb11b1585d78ee [2020-08-18 21:07:55,147 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:07:55,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:07:55,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:55,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:07:55,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:07:55,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:55" (1/1) ... [2020-08-18 21:07:55,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17bb65a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:55, skipping insertion in model container [2020-08-18 21:07:55,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:55" (1/1) ... [2020-08-18 21:07:55,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:07:55,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:07:55,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:55,665 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:07:55,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:55,798 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:07:55,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:55 WrapperNode [2020-08-18 21:07:55,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:55,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:07:55,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:07:55,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:07:55,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:55" (1/1) ... [2020-08-18 21:07:55,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:55" (1/1) ... [2020-08-18 21:07:55,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:55" (1/1) ... [2020-08-18 21:07:55,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:55" (1/1) ... [2020-08-18 21:07:55,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:55" (1/1) ... [2020-08-18 21:07:55,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:55" (1/1) ... [2020-08-18 21:07:55,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:55" (1/1) ... [2020-08-18 21:07:55,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:07:55,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:07:55,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:07:55,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:07:55,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:55" (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 21:07:55,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:07:55,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:07:55,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:07:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 21:07:55,944 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 21:07:55,944 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 21:07:55,944 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 21:07:55,944 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 21:07:55,944 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 21:07:55,944 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 21:07:55,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 21:07:55,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 21:07:55,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 21:07:55,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 21:07:55,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 21:07:55,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 21:07:55,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 21:07:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 21:07:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 21:07:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 21:07:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 21:07:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 21:07:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 21:07:55,947 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 21:07:55,947 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 21:07:55,947 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 21:07:55,947 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 21:07:55,947 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 21:07:55,947 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 21:07:55,947 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 21:07:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 21:07:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 21:07:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 21:07:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 21:07:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 21:07:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 21:07:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 21:07:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 21:07:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 21:07:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 21:07:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 21:07:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 21:07:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 21:07:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 21:07:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 21:07:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 21:07:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 21:07:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 21:07:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 21:07:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 21:07:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 21:07:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 21:07:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 21:07:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 21:07:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 21:07:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 21:07:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 21:07:55,952 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 21:07:55,952 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 21:07:55,952 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 21:07:55,952 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 21:07:55,952 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 21:07:55,952 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 21:07:55,953 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 21:07:55,953 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 21:07:55,953 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 21:07:55,953 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 21:07:55,953 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 21:07:55,953 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 21:07:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 21:07:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 21:07:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 21:07:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 21:07:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 21:07:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 21:07:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 21:07:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 21:07:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 21:07:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 21:07:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 21:07:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 21:07:55,956 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 21:07:55,956 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 21:07:55,956 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 21:07:55,956 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 21:07:55,956 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 21:07:55,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 21:07:55,956 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 21:07:55,957 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 21:07:55,957 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 21:07:55,957 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 21:07:55,957 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 21:07:55,957 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 21:07:55,957 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 21:07:55,958 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 21:07:55,958 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 21:07:55,958 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 21:07:55,958 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 21:07:55,958 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 21:07:55,958 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 21:07:55,959 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 21:07:55,959 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 21:07:55,959 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 21:07:55,959 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 21:07:55,959 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 21:07:55,959 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 21:07:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:07:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:07:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:07:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 21:07:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 21:07:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 21:07:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:07:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:07:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:07:56,638 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:07:56,639 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-18 21:07:56,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:56 BoogieIcfgContainer [2020-08-18 21:07:56,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:07:56,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:07:56,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:07:56,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:07:56,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:07:55" (1/3) ... [2020-08-18 21:07:56,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e84cc17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:56, skipping insertion in model container [2020-08-18 21:07:56,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:55" (2/3) ... [2020-08-18 21:07:56,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e84cc17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:56, skipping insertion in model container [2020-08-18 21:07:56,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:56" (3/3) ... [2020-08-18 21:07:56,654 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-08-18 21:07:56,666 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:07:56,675 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-18 21:07:56,692 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-18 21:07:56,721 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:07:56,722 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:07:56,722 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:07:56,722 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:07:56,723 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:07:56,723 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:07:56,723 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:07:56,723 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:07:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-08-18 21:07:56,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-18 21:07:56,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:56,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:56,770 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:56,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:56,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-08-18 21:07:56,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:56,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548103042] [2020-08-18 21:07:56,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:57,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:57,036 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 21:07:57,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548103042] [2020-08-18 21:07:57,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:57,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:07:57,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482953899] [2020-08-18 21:07:57,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:07:57,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:57,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:07:57,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:57,068 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-08-18 21:07:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:57,325 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-08-18 21:07:57,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:07:57,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-18 21:07:57,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:57,338 INFO L225 Difference]: With dead ends: 186 [2020-08-18 21:07:57,338 INFO L226 Difference]: Without dead ends: 99 [2020-08-18 21:07:57,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-18 21:07:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-08-18 21:07:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 21:07:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-18 21:07:57,392 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-08-18 21:07:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:57,393 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-18 21:07:57,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:07:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-18 21:07:57,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 21:07:57,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:57,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:57,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:07:57,395 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:57,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-08-18 21:07:57,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:57,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070623073] [2020-08-18 21:07:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:57,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:57,460 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 21:07:57,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070623073] [2020-08-18 21:07:57,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:57,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:07:57,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346814368] [2020-08-18 21:07:57,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:07:57,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:57,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:07:57,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:57,464 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-08-18 21:07:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:57,630 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-08-18 21:07:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:07:57,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-18 21:07:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:57,632 INFO L225 Difference]: With dead ends: 84 [2020-08-18 21:07:57,632 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 21:07:57,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:57,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 21:07:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-18 21:07:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-18 21:07:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-08-18 21:07:57,645 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-08-18 21:07:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:57,645 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-08-18 21:07:57,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:07:57,646 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-08-18 21:07:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 21:07:57,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:57,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:57,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:07:57,647 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:57,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-08-18 21:07:57,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:57,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866566861] [2020-08-18 21:07:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:57,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:57,757 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 21:07:57,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866566861] [2020-08-18 21:07:57,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:57,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:57,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796047050] [2020-08-18 21:07:57,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:57,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:57,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:57,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:57,761 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 5 states. [2020-08-18 21:07:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:58,003 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-08-18 21:07:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:07:58,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 21:07:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:58,005 INFO L225 Difference]: With dead ends: 138 [2020-08-18 21:07:58,005 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 21:07:58,006 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 21:07:58,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 21:07:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-08-18 21:07:58,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 21:07:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-08-18 21:07:58,016 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-08-18 21:07:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:58,017 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-08-18 21:07:58,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-08-18 21:07:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 21:07:58,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:58,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:58,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:07:58,019 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:58,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:58,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-08-18 21:07:58,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:58,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550513473] [2020-08-18 21:07:58,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:58,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:58,103 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 21:07:58,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550513473] [2020-08-18 21:07:58,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:58,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:58,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42292173] [2020-08-18 21:07:58,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:58,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:58,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:58,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:58,106 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-08-18 21:07:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:58,281 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-18 21:07:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:58,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 21:07:58,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:58,283 INFO L225 Difference]: With dead ends: 84 [2020-08-18 21:07:58,283 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 21:07:58,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:58,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 21:07:58,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-18 21:07:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 21:07:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-08-18 21:07:58,292 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 14 [2020-08-18 21:07:58,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:58,293 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-08-18 21:07:58,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-08-18 21:07:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:07:58,294 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:58,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:58,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:07:58,295 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:58,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:58,295 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-08-18 21:07:58,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:58,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205822618] [2020-08-18 21:07:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:58,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:58,381 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 21:07:58,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205822618] [2020-08-18 21:07:58,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:58,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:58,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300504153] [2020-08-18 21:07:58,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:58,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:58,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:58,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:58,387 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 5 states. [2020-08-18 21:07:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:58,605 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2020-08-18 21:07:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:58,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-18 21:07:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:58,608 INFO L225 Difference]: With dead ends: 199 [2020-08-18 21:07:58,608 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 21:07:58,610 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 21:07:58,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 21:07:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2020-08-18 21:07:58,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 21:07:58,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-18 21:07:58,619 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 19 [2020-08-18 21:07:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:58,619 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-18 21:07:58,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-18 21:07:58,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:07:58,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:58,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:58,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:07:58,621 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:58,621 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-08-18 21:07:58,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:58,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884211004] [2020-08-18 21:07:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:58,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:58,730 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 21:07:58,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884211004] [2020-08-18 21:07:58,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:58,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:07:58,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653869405] [2020-08-18 21:07:58,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:07:58,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:58,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:07:58,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:07:58,736 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 6 states. [2020-08-18 21:07:58,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:58,968 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-08-18 21:07:58,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:07:58,969 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 21:07:58,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:58,970 INFO L225 Difference]: With dead ends: 126 [2020-08-18 21:07:58,970 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 21:07:58,971 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 21:07:58,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 21:07:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-08-18 21:07:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 21:07:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-08-18 21:07:58,982 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-08-18 21:07:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:58,983 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-08-18 21:07:58,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:07:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-08-18 21:07:58,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:07:58,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:58,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:58,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:07:58,985 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:58,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-08-18 21:07:58,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:58,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205126724] [2020-08-18 21:07:58,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:59,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:59,094 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 21:07:59,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205126724] [2020-08-18 21:07:59,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:59,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:07:59,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874245530] [2020-08-18 21:07:59,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:07:59,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:59,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:07:59,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:07:59,100 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-08-18 21:07:59,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:59,301 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-08-18 21:07:59,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:59,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-18 21:07:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:59,303 INFO L225 Difference]: With dead ends: 136 [2020-08-18 21:07:59,303 INFO L226 Difference]: Without dead ends: 116 [2020-08-18 21:07:59,304 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 21:07:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-18 21:07:59,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-08-18 21:07:59,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 21:07:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-08-18 21:07:59,323 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-08-18 21:07:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:59,324 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-08-18 21:07:59,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:07:59,324 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-08-18 21:07:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:07:59,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:59,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:59,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:07:59,325 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:59,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-08-18 21:07:59,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:59,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635373130] [2020-08-18 21:07:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:59,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:59,390 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 21:07:59,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635373130] [2020-08-18 21:07:59,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:59,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:07:59,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081725402] [2020-08-18 21:07:59,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:07:59,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:59,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:07:59,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:59,394 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-08-18 21:07:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:59,519 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-08-18 21:07:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:07:59,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-18 21:07:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:59,522 INFO L225 Difference]: With dead ends: 141 [2020-08-18 21:07:59,522 INFO L226 Difference]: Without dead ends: 100 [2020-08-18 21:07:59,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:59,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-18 21:07:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2020-08-18 21:07:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 21:07:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-08-18 21:07:59,528 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-08-18 21:07:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:59,528 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-08-18 21:07:59,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:07:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-08-18 21:07:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:07:59,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:59,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:59,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:07:59,530 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:59,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:59,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-08-18 21:07:59,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:59,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059973402] [2020-08-18 21:07:59,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:59,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:59,566 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 21:07:59,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059973402] [2020-08-18 21:07:59,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:59,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:07:59,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018213077] [2020-08-18 21:07:59,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:07:59,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:59,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:07:59,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:59,569 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-08-18 21:07:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:59,675 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-08-18 21:07:59,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:07:59,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-18 21:07:59,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:59,676 INFO L225 Difference]: With dead ends: 79 [2020-08-18 21:07:59,676 INFO L226 Difference]: Without dead ends: 77 [2020-08-18 21:07:59,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-18 21:07:59,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-08-18 21:07:59,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 21:07:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-08-18 21:07:59,685 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 25 [2020-08-18 21:07:59,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:59,685 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-08-18 21:07:59,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:07:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-08-18 21:07:59,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:07:59,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:59,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:59,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:07:59,688 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:59,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-08-18 21:07:59,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:59,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164960835] [2020-08-18 21:07:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:59,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:59,757 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 21:07:59,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164960835] [2020-08-18 21:07:59,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:59,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:59,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086827762] [2020-08-18 21:07:59,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:59,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:59,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:59,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:59,760 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-08-18 21:07:59,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:59,907 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-08-18 21:07:59,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:59,908 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 21:07:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:59,909 INFO L225 Difference]: With dead ends: 78 [2020-08-18 21:07:59,909 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 21:07:59,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 21:07:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-18 21:07:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 21:07:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-18 21:07:59,913 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 27 [2020-08-18 21:07:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:59,914 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-18 21:07:59,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-18 21:07:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 21:07:59,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:59,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:59,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:07:59,916 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:59,916 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-08-18 21:07:59,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:59,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769002435] [2020-08-18 21:07:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:59,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:59,982 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 21:07:59,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769002435] [2020-08-18 21:07:59,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:59,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:07:59,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714423509] [2020-08-18 21:07:59,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:07:59,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:59,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:07:59,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:07:59,984 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 6 states. [2020-08-18 21:08:00,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:00,300 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-08-18 21:08:00,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:08:00,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-18 21:08:00,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:00,303 INFO L225 Difference]: With dead ends: 179 [2020-08-18 21:08:00,303 INFO L226 Difference]: Without dead ends: 137 [2020-08-18 21:08:00,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:08:00,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-18 21:08:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-08-18 21:08:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 21:08:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-18 21:08:00,316 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-08-18 21:08:00,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:00,316 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-18 21:08:00,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:08:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-18 21:08:00,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 21:08:00,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:00,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:00,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:08:00,319 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:00,320 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-08-18 21:08:00,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:00,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066255050] [2020-08-18 21:08:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:00,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:00,660 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 21:08:00,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066255050] [2020-08-18 21:08:00,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:08:00,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 21:08:00,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027735576] [2020-08-18 21:08:00,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:08:00,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:00,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:08:00,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:08:00,663 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 9 states. [2020-08-18 21:08:01,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:01,444 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2020-08-18 21:08:01,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 21:08:01,445 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-18 21:08:01,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:01,449 INFO L225 Difference]: With dead ends: 182 [2020-08-18 21:08:01,449 INFO L226 Difference]: Without dead ends: 180 [2020-08-18 21:08:01,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-18 21:08:01,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-18 21:08:01,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2020-08-18 21:08:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 21:08:01,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-08-18 21:08:01,459 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 28 [2020-08-18 21:08:01,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:01,460 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-08-18 21:08:01,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:08:01,460 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-08-18 21:08:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 21:08:01,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:01,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:01,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:08:01,462 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:01,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:01,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-08-18 21:08:01,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:01,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147984473] [2020-08-18 21:08:01,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:01,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:01,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147984473] [2020-08-18 21:08:01,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:08:01,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:08:01,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478394312] [2020-08-18 21:08:01,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:08:01,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:01,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:08:01,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:08:01,538 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 5 states. [2020-08-18 21:08:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:01,761 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-08-18 21:08:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:08:01,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-18 21:08:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:01,763 INFO L225 Difference]: With dead ends: 150 [2020-08-18 21:08:01,763 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 21:08:01,763 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 21:08:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 21:08:01,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-08-18 21:08:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-18 21:08:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2020-08-18 21:08:01,773 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 30 [2020-08-18 21:08:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:01,774 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2020-08-18 21:08:01,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:08:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2020-08-18 21:08:01,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 21:08:01,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:01,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:01,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:08:01,780 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:01,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:01,781 INFO L82 PathProgramCache]: Analyzing trace with hash -753501909, now seen corresponding path program 1 times [2020-08-18 21:08:01,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:01,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277604709] [2020-08-18 21:08:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:01,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:08:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:08:01,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277604709] [2020-08-18 21:08:01,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:08:01,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:08:01,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056434542] [2020-08-18 21:08:01,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:08:01,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:08:01,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:08:01,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:08:01,842 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand 4 states. [2020-08-18 21:08:02,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:08:02,060 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-08-18 21:08:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:08:02,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-18 21:08:02,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:08:02,062 INFO L225 Difference]: With dead ends: 124 [2020-08-18 21:08:02,062 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 21:08:02,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:08:02,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 21:08:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-08-18 21:08:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-18 21:08:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-08-18 21:08:02,072 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 30 [2020-08-18 21:08:02,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:08:02,072 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-08-18 21:08:02,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:08:02,072 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-08-18 21:08:02,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 21:08:02,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:08:02,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:08:02,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:08:02,074 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:08:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:08:02,074 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-08-18 21:08:02,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:08:02,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646851058] [2020-08-18 21:08:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:08:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:08:02,094 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:08:02,094 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:08:02,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 21:08:02,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:08:02 BoogieIcfgContainer [2020-08-18 21:08:02,145 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:08:02,148 INFO L168 Benchmark]: Toolchain (without parser) took 6998.05 ms. Allocated memory was 140.5 MB in the beginning and 282.1 MB in the end (delta: 141.6 MB). Free memory was 102.4 MB in the beginning and 175.9 MB in the end (delta: -73.5 MB). Peak memory consumption was 68.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:08:02,149 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-18 21:08:02,150 INFO L168 Benchmark]: CACSL2BoogieTranslator took 651.66 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.4 MB in the beginning and 171.1 MB in the end (delta: -68.7 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2020-08-18 21:08:02,151 INFO L168 Benchmark]: Boogie Preprocessor took 74.99 ms. Allocated memory is still 204.5 MB. Free memory was 171.1 MB in the beginning and 167.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:08:02,151 INFO L168 Benchmark]: RCFGBuilder took 767.55 ms. Allocated memory is still 204.5 MB. Free memory was 167.1 MB in the beginning and 111.7 MB in the end (delta: 55.4 MB). Peak memory consumption was 55.4 MB. Max. memory is 7.1 GB. [2020-08-18 21:08:02,155 INFO L168 Benchmark]: TraceAbstraction took 5499.27 ms. Allocated memory was 204.5 MB in the beginning and 282.1 MB in the end (delta: 77.6 MB). Free memory was 110.7 MB in the beginning and 175.9 MB in the end (delta: -65.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-18 21:08:02,161 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 651.66 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.4 MB in the beginning and 171.1 MB in the end (delta: -68.7 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.99 ms. Allocated memory is still 204.5 MB. Free memory was 171.1 MB in the beginning and 167.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 767.55 ms. Allocated memory is still 204.5 MB. Free memory was 167.1 MB in the beginning and 111.7 MB in the end (delta: 55.4 MB). Peak memory consumption was 55.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5499.27 ms. Allocated memory was 204.5 MB in the beginning and 282.1 MB in the end (delta: 77.6 MB). Free memory was 110.7 MB in the beginning and 175.9 MB in the end (delta: -65.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) [L995] COND FALSE !(!(list != ((void*)0))) [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list [L1015] COND FALSE !(!(((void*)0) != end)) [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner [L1023] COND TRUE len == 0 [L1024] len = 1 [L1027] COND FALSE !(!(((void*)0) != inner)) [L1028] EXPR inner->inner [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1016 SDtfs, 1075 SDslu, 1380 SDs, 0 SdLazy, 1834 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=13, 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, 14 MinimizatonAttempts, 367 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 331 NumberOfCodeBlocks, 331 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 286 ConstructedInterpolants, 0 QuantifiedInterpolants, 49886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 2/2 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...