/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=BIGGEST -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 17:54:36,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:54:36,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:54:36,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:54:36,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:54:36,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:54:36,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:54:36,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:54:36,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:54:36,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:54:36,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:54:36,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:54:36,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:54:36,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:54:36,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:54:36,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:54:36,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:54:36,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:54:36,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:54:36,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:54:36,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:54:36,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:54:36,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:54:36,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:54:36,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:54:36,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:54:36,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:54:36,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:54:36,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:54:36,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:54:36,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:54:36,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:54:36,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:54:36,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:54:36,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:54:36,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:54:36,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:54:36,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:54:36,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:54:36,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:54:36,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:54:36,949 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 17:54:36,990 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:54:36,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:54:36,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:54:36,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:54:36,993 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:54:36,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:54:36,994 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:54:36,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:54:36,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:54:36,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:54:36,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:54:36,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:54:36,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:54:36,996 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:54:36,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:54:36,997 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:54:36,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:54:36,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:54:36,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:54:36,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:54:36,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:54:36,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:54:36,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:54:36,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:54:36,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:54:36,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:54:36,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:54:36,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:54:36,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:54:36,999 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:54:37,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:54:37,309 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:54:37,315 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:54:37,316 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:54:37,316 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:54:37,317 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-18 17:54:37,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/476a1d50d/5032ebb496234c64b4c6710071ab5c3f/FLAG5fdb29493 [2020-08-18 17:54:37,932 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:54:37,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-18 17:54:37,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/476a1d50d/5032ebb496234c64b4c6710071ab5c3f/FLAG5fdb29493 [2020-08-18 17:54:38,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/476a1d50d/5032ebb496234c64b4c6710071ab5c3f [2020-08-18 17:54:38,177 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:54:38,178 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:54:38,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:54:38,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:54:38,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:54:38,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:54:38" (1/1) ... [2020-08-18 17:54:38,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c7ba8b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:38, skipping insertion in model container [2020-08-18 17:54:38,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:54:38" (1/1) ... [2020-08-18 17:54:38,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:54:38,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:54:38,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:54:38,664 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:54:38,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:54:38,798 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:54:38,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:38 WrapperNode [2020-08-18 17:54:38,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:54:38,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:54:38,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:54:38,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:54:38,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:38" (1/1) ... [2020-08-18 17:54:38,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:38" (1/1) ... [2020-08-18 17:54:38,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:38" (1/1) ... [2020-08-18 17:54:38,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:38" (1/1) ... [2020-08-18 17:54:38,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:38" (1/1) ... [2020-08-18 17:54:38,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:38" (1/1) ... [2020-08-18 17:54:38,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:38" (1/1) ... [2020-08-18 17:54:38,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:54:38,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:54:38,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:54:38,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:54:38,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:38" (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 17:54:38,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:54:38,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:54:38,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:54:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 17:54:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 17:54:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 17:54:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 17:54:38,945 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 17:54:38,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 17:54:38,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 17:54:38,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 17:54:38,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 17:54:38,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 17:54:38,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 17:54:38,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 17:54:38,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 17:54:38,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 17:54:38,948 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 17:54:38,948 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 17:54:38,948 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 17:54:38,949 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 17:54:38,949 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 17:54:38,949 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 17:54:38,949 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 17:54:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 17:54:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 17:54:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 17:54:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 17:54:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 17:54:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 17:54:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 17:54:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 17:54:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 17:54:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 17:54:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 17:54:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 17:54:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 17:54:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 17:54:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 17:54:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 17:54:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 17:54:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 17:54:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 17:54:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 17:54:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 17:54:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 17:54:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 17:54:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 17:54:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 17:54:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 17:54:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 17:54:38,956 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 17:54:38,956 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 17:54:38,956 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 17:54:38,956 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 17:54:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 17:54:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 17:54:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 17:54:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 17:54:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 17:54:38,958 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 17:54:38,958 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 17:54:38,958 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 17:54:38,958 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 17:54:38,958 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 17:54:38,958 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 17:54:38,958 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 17:54:38,959 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 17:54:38,960 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 17:54:38,960 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 17:54:38,960 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 17:54:38,960 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 17:54:38,961 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 17:54:38,961 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 17:54:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 17:54:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 17:54:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 17:54:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 17:54:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 17:54:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 17:54:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 17:54:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 17:54:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 17:54:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 17:54:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 17:54:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 17:54:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 17:54:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 17:54:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 17:54:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 17:54:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 17:54:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 17:54:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 17:54:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 17:54:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 17:54:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 17:54:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 17:54:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 17:54:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 17:54:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 17:54:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 17:54:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 17:54:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 17:54:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 17:54:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 17:54:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 17:54:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:54:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:54:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:54:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 17:54:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 17:54:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 17:54:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:54:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:54:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:54:39,665 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:54:39,666 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-18 17:54:39,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:54:39 BoogieIcfgContainer [2020-08-18 17:54:39,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:54:39,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:54:39,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:54:39,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:54:39,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:54:38" (1/3) ... [2020-08-18 17:54:39,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2510a7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:54:39, skipping insertion in model container [2020-08-18 17:54:39,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:38" (2/3) ... [2020-08-18 17:54:39,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2510a7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:54:39, skipping insertion in model container [2020-08-18 17:54:39,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:54:39" (3/3) ... [2020-08-18 17:54:39,687 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-08-18 17:54:39,699 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:54:39,708 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-18 17:54:39,723 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-18 17:54:39,763 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:54:39,766 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:54:39,767 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:54:39,767 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:54:39,767 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:54:39,768 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:54:39,768 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:54:39,769 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:54:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-08-18 17:54:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-18 17:54:39,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:39,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:39,814 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 17:54:39,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:39,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-08-18 17:54:39,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:39,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372570818] [2020-08-18 17:54:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:40,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:40,096 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 17:54:40,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372570818] [2020-08-18 17:54:40,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:40,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:54:40,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25508177] [2020-08-18 17:54:40,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:54:40,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:40,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:54:40,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:54:40,151 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-08-18 17:54:40,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:40,395 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-08-18 17:54:40,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:54:40,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-18 17:54:40,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:40,408 INFO L225 Difference]: With dead ends: 186 [2020-08-18 17:54:40,408 INFO L226 Difference]: Without dead ends: 99 [2020-08-18 17:54:40,413 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 17:54:40,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-18 17:54:40,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-08-18 17:54:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 17:54:40,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-18 17:54:40,457 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-08-18 17:54:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:40,458 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-18 17:54:40,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:54:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-18 17:54:40,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 17:54:40,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:40,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:40,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:54:40,460 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 17:54:40,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:40,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-08-18 17:54:40,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:40,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877182959] [2020-08-18 17:54:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:40,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:40,543 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 17:54:40,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877182959] [2020-08-18 17:54:40,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:40,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:54:40,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418057155] [2020-08-18 17:54:40,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:54:40,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:40,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:54:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:54:40,547 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-08-18 17:54:40,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:40,725 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-08-18 17:54:40,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:54:40,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-18 17:54:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:40,728 INFO L225 Difference]: With dead ends: 84 [2020-08-18 17:54:40,728 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 17:54:40,729 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 17:54:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 17:54:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-18 17:54:40,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-18 17:54:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-08-18 17:54:40,741 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-08-18 17:54:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:40,741 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-08-18 17:54:40,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:54:40,742 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-08-18 17:54:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 17:54:40,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:40,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:40,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:54:40,743 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 17:54:40,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:40,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-08-18 17:54:40,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:40,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543504296] [2020-08-18 17:54:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:40,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:40,818 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 17:54:40,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543504296] [2020-08-18 17:54:40,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:40,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:54:40,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965110790] [2020-08-18 17:54:40,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:54:40,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:40,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:54:40,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:54:40,821 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 5 states. [2020-08-18 17:54:41,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:41,056 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-08-18 17:54:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:54:41,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 17:54:41,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:41,058 INFO L225 Difference]: With dead ends: 138 [2020-08-18 17:54:41,058 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 17:54:41,059 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 17:54:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 17:54:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-08-18 17:54:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 17:54:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-08-18 17:54:41,070 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-08-18 17:54:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:41,070 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-08-18 17:54:41,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:54:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-08-18 17:54:41,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 17:54:41,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:41,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:41,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:54:41,073 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 17:54:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:41,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-08-18 17:54:41,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:41,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162807105] [2020-08-18 17:54:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:41,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:41,190 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 17:54:41,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162807105] [2020-08-18 17:54:41,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:41,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:54:41,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837314705] [2020-08-18 17:54:41,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:54:41,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:41,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:54:41,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:54:41,193 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-08-18 17:54:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:41,394 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-18 17:54:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:54:41,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 17:54:41,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:41,396 INFO L225 Difference]: With dead ends: 84 [2020-08-18 17:54:41,397 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 17:54:41,397 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 17:54:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 17:54:41,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-18 17:54:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 17:54:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-08-18 17:54:41,405 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 14 [2020-08-18 17:54:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:41,406 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-08-18 17:54:41,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:54:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-08-18 17:54:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:54:41,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:41,407 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 17:54:41,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:54:41,407 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 17:54:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:41,408 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-08-18 17:54:41,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:41,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572199506] [2020-08-18 17:54:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:41,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:41,513 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 17:54:41,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572199506] [2020-08-18 17:54:41,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:41,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:54:41,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447833387] [2020-08-18 17:54:41,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:54:41,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:41,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:54:41,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:54:41,517 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 5 states. [2020-08-18 17:54:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:41,732 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2020-08-18 17:54:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:54:41,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-18 17:54:41,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:41,734 INFO L225 Difference]: With dead ends: 199 [2020-08-18 17:54:41,734 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 17:54:41,735 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 17:54:41,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 17:54:41,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2020-08-18 17:54:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 17:54:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-18 17:54:41,756 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 19 [2020-08-18 17:54:41,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:41,756 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-18 17:54:41,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:54:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-18 17:54:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:54:41,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:41,757 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 17:54:41,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:54:41,761 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 17:54:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:41,761 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-08-18 17:54:41,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:41,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055482503] [2020-08-18 17:54:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:41,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:41,895 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 17:54:41,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055482503] [2020-08-18 17:54:41,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:41,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:54:41,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576753115] [2020-08-18 17:54:41,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:54:41,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:41,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:54:41,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:54:41,899 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 6 states. [2020-08-18 17:54:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:42,128 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-08-18 17:54:42,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:54:42,128 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 17:54:42,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:42,129 INFO L225 Difference]: With dead ends: 126 [2020-08-18 17:54:42,130 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 17:54:42,130 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 17:54:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 17:54:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-08-18 17:54:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 17:54:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-08-18 17:54:42,137 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-08-18 17:54:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:42,138 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-08-18 17:54:42,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:54:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-08-18 17:54:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 17:54:42,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:42,139 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 17:54:42,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:54:42,139 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 17:54:42,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:42,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-08-18 17:54:42,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:42,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840795978] [2020-08-18 17:54:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:42,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:42,190 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 17:54:42,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840795978] [2020-08-18 17:54:42,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:42,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:54:42,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022280356] [2020-08-18 17:54:42,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:54:42,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:42,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:54:42,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:54:42,193 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-08-18 17:54:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:42,378 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-08-18 17:54:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:54:42,378 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-18 17:54:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:42,379 INFO L225 Difference]: With dead ends: 136 [2020-08-18 17:54:42,379 INFO L226 Difference]: Without dead ends: 116 [2020-08-18 17:54:42,380 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 17:54:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-18 17:54:42,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-08-18 17:54:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 17:54:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-08-18 17:54:42,387 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-08-18 17:54:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:42,387 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-08-18 17:54:42,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:54:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-08-18 17:54:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:54:42,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:42,389 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 17:54:42,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:54:42,389 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 17:54:42,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:42,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-08-18 17:54:42,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:42,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713177755] [2020-08-18 17:54:42,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:42,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:42,451 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 17:54:42,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713177755] [2020-08-18 17:54:42,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:42,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:54:42,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514741445] [2020-08-18 17:54:42,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:54:42,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:42,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:54:42,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:54:42,453 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-08-18 17:54:42,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:42,583 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-08-18 17:54:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:54:42,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-18 17:54:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:42,584 INFO L225 Difference]: With dead ends: 141 [2020-08-18 17:54:42,585 INFO L226 Difference]: Without dead ends: 100 [2020-08-18 17:54:42,585 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 17:54:42,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-18 17:54:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2020-08-18 17:54:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 17:54:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-08-18 17:54:42,591 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-08-18 17:54:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:42,592 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-08-18 17:54:42,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:54:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-08-18 17:54:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:54:42,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:42,593 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 17:54:42,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:54:42,593 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 17:54:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:42,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-08-18 17:54:42,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:42,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214697109] [2020-08-18 17:54:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:42,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:42,633 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 17:54:42,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214697109] [2020-08-18 17:54:42,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:42,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:54:42,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955435020] [2020-08-18 17:54:42,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:54:42,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:42,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:54:42,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:54:42,635 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-08-18 17:54:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:42,743 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-08-18 17:54:42,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:54:42,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-18 17:54:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:42,745 INFO L225 Difference]: With dead ends: 79 [2020-08-18 17:54:42,745 INFO L226 Difference]: Without dead ends: 77 [2020-08-18 17:54:42,745 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 17:54:42,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-18 17:54:42,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-08-18 17:54:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 17:54:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-08-18 17:54:42,751 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 25 [2020-08-18 17:54:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:42,751 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-08-18 17:54:42,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:54:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-08-18 17:54:42,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 17:54:42,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:42,752 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 17:54:42,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:54:42,753 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 17:54:42,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:42,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-08-18 17:54:42,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:42,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614705035] [2020-08-18 17:54:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:42,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:42,805 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 17:54:42,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614705035] [2020-08-18 17:54:42,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:42,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:54:42,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692282177] [2020-08-18 17:54:42,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:54:42,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:42,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:54:42,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:54:42,807 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-08-18 17:54:42,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:42,945 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-08-18 17:54:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:54:42,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 17:54:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:42,947 INFO L225 Difference]: With dead ends: 78 [2020-08-18 17:54:42,947 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 17:54:42,947 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 17:54:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 17:54:42,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-18 17:54:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 17:54:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-18 17:54:42,952 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 27 [2020-08-18 17:54:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:42,952 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-18 17:54:42,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:54:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-18 17:54:42,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 17:54:42,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:42,954 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 17:54:42,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:54:42,954 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 17:54:42,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:42,954 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-08-18 17:54:42,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:42,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267346506] [2020-08-18 17:54:42,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:43,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:43,020 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 17:54:43,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267346506] [2020-08-18 17:54:43,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:43,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:54:43,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76280286] [2020-08-18 17:54:43,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:54:43,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:43,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:54:43,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:54:43,022 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 6 states. [2020-08-18 17:54:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:43,314 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-08-18 17:54:43,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:54:43,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-18 17:54:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:43,316 INFO L225 Difference]: With dead ends: 179 [2020-08-18 17:54:43,316 INFO L226 Difference]: Without dead ends: 137 [2020-08-18 17:54:43,317 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 17:54:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-18 17:54:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-08-18 17:54:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 17:54:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-18 17:54:43,327 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-08-18 17:54:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:43,327 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-18 17:54:43,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:54:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-18 17:54:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 17:54:43,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:43,330 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 17:54:43,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:54:43,330 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 17:54:43,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:43,331 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-08-18 17:54:43,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:43,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908591170] [2020-08-18 17:54:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:43,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:43,690 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 17:54:43,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908591170] [2020-08-18 17:54:43,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:43,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 17:54:43,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251484521] [2020-08-18 17:54:43,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:54:43,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:43,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:54:43,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:54:43,693 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 9 states. [2020-08-18 17:54:44,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:44,521 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2020-08-18 17:54:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 17:54:44,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-18 17:54:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:44,525 INFO L225 Difference]: With dead ends: 182 [2020-08-18 17:54:44,526 INFO L226 Difference]: Without dead ends: 180 [2020-08-18 17:54:44,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:54:44,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-18 17:54:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2020-08-18 17:54:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 17:54:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-08-18 17:54:44,535 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 28 [2020-08-18 17:54:44,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:44,536 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-08-18 17:54:44,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:54:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-08-18 17:54:44,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 17:54:44,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:44,537 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 17:54:44,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:54:44,538 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 17:54:44,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:44,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-08-18 17:54:44,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:44,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251264321] [2020-08-18 17:54:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:44,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:44,593 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 17:54:44,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251264321] [2020-08-18 17:54:44,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:44,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:54:44,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313532147] [2020-08-18 17:54:44,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:54:44,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:44,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:54:44,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:54:44,596 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 5 states. [2020-08-18 17:54:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:44,802 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-08-18 17:54:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:54:44,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-18 17:54:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:44,803 INFO L225 Difference]: With dead ends: 150 [2020-08-18 17:54:44,803 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 17:54:44,804 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 17:54:44,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 17:54:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-08-18 17:54:44,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-18 17:54:44,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2020-08-18 17:54:44,813 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 30 [2020-08-18 17:54:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:44,814 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2020-08-18 17:54:44,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:54:44,814 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2020-08-18 17:54:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 17:54:44,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:44,818 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 17:54:44,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:54:44,819 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 17:54:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:44,819 INFO L82 PathProgramCache]: Analyzing trace with hash -753501909, now seen corresponding path program 1 times [2020-08-18 17:54:44,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:44,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788923600] [2020-08-18 17:54:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:44,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:44,874 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 17:54:44,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788923600] [2020-08-18 17:54:44,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:44,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:54:44,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984704359] [2020-08-18 17:54:44,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:54:44,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:44,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:54:44,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:54:44,877 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand 4 states. [2020-08-18 17:54:45,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:45,017 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-08-18 17:54:45,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:54:45,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-18 17:54:45,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:45,018 INFO L225 Difference]: With dead ends: 124 [2020-08-18 17:54:45,019 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 17:54:45,019 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 17:54:45,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 17:54:45,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-08-18 17:54:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-18 17:54:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-08-18 17:54:45,028 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 30 [2020-08-18 17:54:45,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:45,028 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-08-18 17:54:45,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:54:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-08-18 17:54:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 17:54:45,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:45,029 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 17:54:45,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:54:45,030 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 17:54:45,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:45,030 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-08-18 17:54:45,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:45,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543250211] [2020-08-18 17:54:45,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:54:45,045 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:54:45,045 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:54:45,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:54:45,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:54:45 BoogieIcfgContainer [2020-08-18 17:54:45,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:54:45,073 INFO L168 Benchmark]: Toolchain (without parser) took 6893.35 ms. Allocated memory was 148.4 MB in the beginning and 280.0 MB in the end (delta: 131.6 MB). Free memory was 102.8 MB in the beginning and 161.2 MB in the end (delta: -58.4 MB). Peak memory consumption was 73.2 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:45,073 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:54:45,074 INFO L168 Benchmark]: CACSL2BoogieTranslator took 622.00 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 102.6 MB in the beginning and 171.5 MB in the end (delta: -68.9 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:45,075 INFO L168 Benchmark]: Boogie Preprocessor took 77.30 ms. Allocated memory is still 205.0 MB. Free memory was 171.5 MB in the beginning and 168.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:45,075 INFO L168 Benchmark]: RCFGBuilder took 795.53 ms. Allocated memory is still 205.0 MB. Free memory was 168.1 MB in the beginning and 112.6 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:45,076 INFO L168 Benchmark]: TraceAbstraction took 5392.07 ms. Allocated memory was 205.0 MB in the beginning and 280.0 MB in the end (delta: 75.0 MB). Free memory was 112.0 MB in the beginning and 161.2 MB in the end (delta: -49.3 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:45,079 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 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 622.00 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 102.6 MB in the beginning and 171.5 MB in the end (delta: -68.9 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 77.30 ms. Allocated memory is still 205.0 MB. Free memory was 171.5 MB in the beginning and 168.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 795.53 ms. Allocated memory is still 205.0 MB. Free memory was 168.1 MB in the beginning and 112.6 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5392.07 ms. Allocated memory was 205.0 MB in the beginning and 280.0 MB in the end (delta: 75.0 MB). Free memory was 112.0 MB in the beginning and 161.2 MB in the end (delta: -49.3 MB). Peak memory consumption was 25.7 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: 5.2s, 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, 1.1s 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, 1.1s 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...