/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:22:44,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:22:44,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:22:44,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:22:44,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:22:44,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:22:44,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:22:44,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:22:44,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:22:44,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:22:44,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:22:44,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:22:44,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:22:44,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:22:44,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:22:44,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:22:44,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:22:44,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:22:44,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:22:44,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:22:44,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:22:44,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:22:44,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:22:44,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:22:44,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:22:44,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:22:44,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:22:44,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:22:44,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:22:44,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 21:22:44,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:22:44,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:22:44,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:22:44,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:22:44,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:22:44,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:22:44,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:22:44,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:22:44,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:22:44,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:22:44,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:22:44,853 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:22:44,893 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:22:44,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:22:44,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:22:44,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:22:44,896 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:22:44,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:22:44,897 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:22:44,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:22:44,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:22:44,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:22:44,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:22:44,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:22:44,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:22:44,899 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:22:44,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:22:44,899 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:22:44,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:22:44,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:22:44,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:22:44,900 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:22:44,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:22:44,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:22:44,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:22:44,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:22:44,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:22:44,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:22:44,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:22:44,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:22:44,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:22:44,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:22:45,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:22:45,238 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:22:45,242 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:22:45,243 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:22:45,244 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:22:45,245 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-21 21:22:45,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c065f6b4/8a5871bc26014be58e385680e62134ea/FLAGef7d18b6a [2020-08-21 21:22:45,868 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:22:45,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-21 21:22:45,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c065f6b4/8a5871bc26014be58e385680e62134ea/FLAGef7d18b6a [2020-08-21 21:22:46,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c065f6b4/8a5871bc26014be58e385680e62134ea [2020-08-21 21:22:46,180 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:22:46,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:22:46,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:22:46,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:22:46,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:22:46,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:22:46" (1/1) ... [2020-08-21 21:22:46,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@794240ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:46, skipping insertion in model container [2020-08-21 21:22:46,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:22:46" (1/1) ... [2020-08-21 21:22:46,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:22:46,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:22:46,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:22:46,757 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:22:46,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:22:46,890 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:22:46,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:46 WrapperNode [2020-08-21 21:22:46,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:22:46,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:22:46,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:22:46,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:22:46,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:46" (1/1) ... [2020-08-21 21:22:46,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:46" (1/1) ... [2020-08-21 21:22:46,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:46" (1/1) ... [2020-08-21 21:22:46,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:46" (1/1) ... [2020-08-21 21:22:46,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:46" (1/1) ... [2020-08-21 21:22:46,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:46" (1/1) ... [2020-08-21 21:22:46,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:46" (1/1) ... [2020-08-21 21:22:46,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:22:46,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:22:46,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:22:46,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:22:46,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:22:47,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:22:47,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:22:47,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 21:22:47,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-21 21:22:47,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-21 21:22:47,061 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-21 21:22:47,061 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2020-08-21 21:22:47,061 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2020-08-21 21:22:47,061 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2020-08-21 21:22:47,063 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2020-08-21 21:22:47,063 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2020-08-21 21:22:47,063 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2020-08-21 21:22:47,063 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2020-08-21 21:22:47,063 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2020-08-21 21:22:47,063 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2020-08-21 21:22:47,064 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2020-08-21 21:22:47,064 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2020-08-21 21:22:47,065 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2020-08-21 21:22:47,065 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2020-08-21 21:22:47,065 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2020-08-21 21:22:47,066 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2020-08-21 21:22:47,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:22:47,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:22:47,066 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 21:22:47,068 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 21:22:47,069 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 21:22:47,069 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 21:22:47,069 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 21:22:47,070 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 21:22:47,070 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 21:22:47,070 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 21:22:47,070 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 21:22:47,070 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 21:22:47,070 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 21:22:47,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 21:22:47,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 21:22:47,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 21:22:47,071 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 21:22:47,071 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 21:22:47,071 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-21 21:22:47,071 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-21 21:22:47,072 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 21:22:47,072 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 21:22:47,072 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 21:22:47,072 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 21:22:47,072 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 21:22:47,072 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 21:22:47,072 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 21:22:47,073 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 21:22:47,073 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 21:22:47,073 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 21:22:47,073 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 21:22:47,073 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 21:22:47,073 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 21:22:47,074 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 21:22:47,074 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 21:22:47,074 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 21:22:47,075 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 21:22:47,075 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 21:22:47,075 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 21:22:47,075 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 21:22:47,075 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 21:22:47,075 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 21:22:47,075 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 21:22:47,076 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 21:22:47,076 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 21:22:47,076 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 21:22:47,077 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 21:22:47,077 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 21:22:47,077 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 21:22:47,077 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 21:22:47,078 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 21:22:47,078 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 21:22:47,079 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 21:22:47,079 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 21:22:47,079 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 21:22:47,080 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 21:22:47,080 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 21:22:47,080 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 21:22:47,080 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 21:22:47,081 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 21:22:47,081 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 21:22:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 21:22:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 21:22:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 21:22:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 21:22:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 21:22:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 21:22:47,083 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 21:22:47,083 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 21:22:47,083 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 21:22:47,083 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 21:22:47,083 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 21:22:47,083 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 21:22:47,083 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 21:22:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 21:22:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 21:22:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 21:22:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 21:22:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 21:22:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 21:22:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 21:22:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 21:22:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 21:22:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 21:22:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 21:22:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 21:22:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 21:22:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 21:22:47,086 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 21:22:47,086 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 21:22:47,086 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 21:22:47,086 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 21:22:47,086 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 21:22:47,086 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 21:22:47,086 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 21:22:47,087 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 21:22:47,087 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 21:22:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 21:22:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 21:22:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 21:22:47,089 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 21:22:47,089 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 21:22:47,089 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 21:22:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 21:22:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 21:22:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 21:22:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 21:22:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:22:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-21 21:22:47,091 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2020-08-21 21:22:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 21:22:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 21:22:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2020-08-21 21:22:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2020-08-21 21:22:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 21:22:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2020-08-21 21:22:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 21:22:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 21:22:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 21:22:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:22:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2020-08-21 21:22:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2020-08-21 21:22:47,103 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2020-08-21 21:22:47,103 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2020-08-21 21:22:47,103 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2020-08-21 21:22:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2020-08-21 21:22:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2020-08-21 21:22:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2020-08-21 21:22:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2020-08-21 21:22:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2020-08-21 21:22:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2020-08-21 21:22:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:22:47,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:22:47,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:22:47,960 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:22:47,961 INFO L295 CfgBuilder]: Removed 38 assume(true) statements. [2020-08-21 21:22:47,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:22:47 BoogieIcfgContainer [2020-08-21 21:22:47,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:22:47,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:22:47,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:22:47,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:22:47,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:22:46" (1/3) ... [2020-08-21 21:22:47,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f39c507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:22:47, skipping insertion in model container [2020-08-21 21:22:47,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:46" (2/3) ... [2020-08-21 21:22:47,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f39c507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:22:47, skipping insertion in model container [2020-08-21 21:22:47,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:22:47" (3/3) ... [2020-08-21 21:22:47,979 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2020-08-21 21:22:47,989 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:22:47,999 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:22:48,014 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:22:48,043 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:22:48,043 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:22:48,043 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:22:48,043 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:22:48,043 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:22:48,043 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:22:48,044 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:22:48,044 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:22:48,066 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-08-21 21:22:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 21:22:48,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:48,076 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:48,076 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:48,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1405399524, now seen corresponding path program 1 times [2020-08-21 21:22:48,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:48,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828303946] [2020-08-21 21:22:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:22:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:22:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 21:22:48,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828303946] [2020-08-21 21:22:48,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:48,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:22:48,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029827341] [2020-08-21 21:22:48,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:22:48,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:48,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:22:48,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:22:48,730 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 4 states. [2020-08-21 21:22:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:49,206 INFO L93 Difference]: Finished difference Result 343 states and 542 transitions. [2020-08-21 21:22:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 21:22:49,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-08-21 21:22:49,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:49,235 INFO L225 Difference]: With dead ends: 343 [2020-08-21 21:22:49,235 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 21:22:49,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:22:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 21:22:49,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2020-08-21 21:22:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-21 21:22:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-08-21 21:22:49,329 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 59 [2020-08-21 21:22:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:49,330 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-08-21 21:22:49,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:22:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-08-21 21:22:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 21:22:49,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:49,334 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:49,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:22:49,335 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:49,335 INFO L82 PathProgramCache]: Analyzing trace with hash 747676979, now seen corresponding path program 1 times [2020-08-21 21:22:49,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:49,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117923395] [2020-08-21 21:22:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:22:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:22:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 21:22:49,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117923395] [2020-08-21 21:22:49,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:22:49,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 21:22:49,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168476399] [2020-08-21 21:22:49,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:22:49,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:49,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:22:49,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:22:49,780 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 13 states. [2020-08-21 21:22:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:50,997 INFO L93 Difference]: Finished difference Result 327 states and 406 transitions. [2020-08-21 21:22:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:22:50,998 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-08-21 21:22:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:51,001 INFO L225 Difference]: With dead ends: 327 [2020-08-21 21:22:51,001 INFO L226 Difference]: Without dead ends: 179 [2020-08-21 21:22:51,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-08-21 21:22:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-21 21:22:51,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 168. [2020-08-21 21:22:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 21:22:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2020-08-21 21:22:51,027 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 60 [2020-08-21 21:22:51,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:51,027 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2020-08-21 21:22:51,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:22:51,028 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2020-08-21 21:22:51,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 21:22:51,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:51,031 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:51,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:22:51,032 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:51,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:51,032 INFO L82 PathProgramCache]: Analyzing trace with hash 586330229, now seen corresponding path program 1 times [2020-08-21 21:22:51,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:51,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174943343] [2020-08-21 21:22:51,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:22:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:22:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:22:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 21:22:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:22:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:22:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 93 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-21 21:22:52,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174943343] [2020-08-21 21:22:52,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:22:52,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 21:22:52,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567052895] [2020-08-21 21:22:52,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 21:22:52,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:52,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 21:22:52,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-21 21:22:52,589 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand 28 states. [2020-08-21 21:22:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:55,715 INFO L93 Difference]: Finished difference Result 348 states and 425 transitions. [2020-08-21 21:22:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 21:22:55,715 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-21 21:22:55,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:55,718 INFO L225 Difference]: With dead ends: 348 [2020-08-21 21:22:55,719 INFO L226 Difference]: Without dead ends: 189 [2020-08-21 21:22:55,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 21:22:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-21 21:22:55,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2020-08-21 21:22:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-21 21:22:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 208 transitions. [2020-08-21 21:22:55,750 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 208 transitions. Word has length 154 [2020-08-21 21:22:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:55,750 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 208 transitions. [2020-08-21 21:22:55,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 21:22:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 208 transitions. [2020-08-21 21:22:55,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 21:22:55,756 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:55,756 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:55,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:22:55,756 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:55,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:55,759 INFO L82 PathProgramCache]: Analyzing trace with hash -467161035, now seen corresponding path program 1 times [2020-08-21 21:22:55,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:55,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615215099] [2020-08-21 21:22:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:55,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:55,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:22:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:22:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:22:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 21:22:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:22:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:22:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:56,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-08-21 21:22:57,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615215099] [2020-08-21 21:22:57,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:22:57,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 21:22:57,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636979772] [2020-08-21 21:22:57,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 21:22:57,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:57,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 21:22:57,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-08-21 21:22:57,172 INFO L87 Difference]: Start difference. First operand 176 states and 208 transitions. Second operand 19 states. [2020-08-21 21:22:59,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:59,353 INFO L93 Difference]: Finished difference Result 360 states and 431 transitions. [2020-08-21 21:22:59,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 21:22:59,354 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 154 [2020-08-21 21:22:59,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:59,357 INFO L225 Difference]: With dead ends: 360 [2020-08-21 21:22:59,358 INFO L226 Difference]: Without dead ends: 193 [2020-08-21 21:22:59,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-08-21 21:22:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-21 21:22:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 182. [2020-08-21 21:22:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-21 21:22:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-08-21 21:22:59,381 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 154 [2020-08-21 21:22:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:59,382 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-08-21 21:22:59,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 21:22:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-08-21 21:22:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 21:22:59,384 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:59,384 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:59,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:22:59,385 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1717739637, now seen corresponding path program 1 times [2020-08-21 21:22:59,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:59,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610113568] [2020-08-21 21:22:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:59,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:59,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:22:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:59,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:59,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:59,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:23:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 21:23:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:23:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:00,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2020-08-21 21:23:01,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610113568] [2020-08-21 21:23:01,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:23:01,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 21:23:01,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293350987] [2020-08-21 21:23:01,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 21:23:01,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:23:01,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 21:23:01,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-21 21:23:01,212 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 28 states. [2020-08-21 21:23:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:23:04,161 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2020-08-21 21:23:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 21:23:04,162 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-21 21:23:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:23:04,168 INFO L225 Difference]: With dead ends: 371 [2020-08-21 21:23:04,168 INFO L226 Difference]: Without dead ends: 198 [2020-08-21 21:23:04,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 21:23:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-21 21:23:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2020-08-21 21:23:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 21:23:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 217 transitions. [2020-08-21 21:23:04,206 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 217 transitions. Word has length 154 [2020-08-21 21:23:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:23:04,209 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 217 transitions. [2020-08-21 21:23:04,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 21:23:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 217 transitions. [2020-08-21 21:23:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 21:23:04,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:04,217 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:23:04,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:23:04,217 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:04,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2084601485, now seen corresponding path program 1 times [2020-08-21 21:23:04,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:04,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029076250] [2020-08-21 21:23:04,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:23:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:23:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:04,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 21:23:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:05,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:05,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:05,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:23:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:05,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:05,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:05,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:05,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:05,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:05,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:05,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-08-21 21:23:05,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029076250] [2020-08-21 21:23:05,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:23:05,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 21:23:05,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105419933] [2020-08-21 21:23:05,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 21:23:05,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:23:05,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 21:23:05,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-08-21 21:23:05,357 INFO L87 Difference]: Start difference. First operand 185 states and 217 transitions. Second operand 22 states. [2020-08-21 21:23:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:23:07,570 INFO L93 Difference]: Finished difference Result 323 states and 388 transitions. [2020-08-21 21:23:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 21:23:07,571 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-08-21 21:23:07,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:23:07,577 INFO L225 Difference]: With dead ends: 323 [2020-08-21 21:23:07,577 INFO L226 Difference]: Without dead ends: 254 [2020-08-21 21:23:07,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 21:23:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-08-21 21:23:07,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2020-08-21 21:23:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-21 21:23:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 246 transitions. [2020-08-21 21:23:07,605 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 246 transitions. Word has length 154 [2020-08-21 21:23:07,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:23:07,606 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 246 transitions. [2020-08-21 21:23:07,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 21:23:07,607 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 246 transitions. [2020-08-21 21:23:07,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-21 21:23:07,608 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:07,609 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:23:07,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:23:07,609 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:07,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:07,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1709746076, now seen corresponding path program 1 times [2020-08-21 21:23:07,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:07,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007833472] [2020-08-21 21:23:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:07,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:07,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:23:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:08,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:08,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:08,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:08,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:23:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,879 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-08-21 21:23:10,654 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 20 [2020-08-21 21:23:11,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:11,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:11,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:11,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:11,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:11,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:12,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 21:23:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:12,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:23:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:12,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:13,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:23:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:13,840 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-21 21:23:13,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat